My Inquiry
My Account
Texas Instruments AM1705DPTP4
- Part No.:
- AM1705DPTP4
- Manufacturer:
- Texas Instruments
- Category:
- Microprocessors
- Package:
- 176-LQFP Exposed Pad
- Datasheet:
-
AM1705DPTP4.pdf
- Description:
- IC MPU SITARA 456MHZ 176HLQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,981
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AM1705DPTP4 from Texas Instruments is a 375-MHz ARM926EJ-S™ microprocessor with 16KB instruction cache, 16KB data cache, 128KB on-chip RAM, and integrated peripherals including 10/100 Mbps Ethernet MAC (RMII), three UARTs (one with RTS/CTS), two McASPs, USB 2.0 OTG with PHY, and PRUSS dual-core real-time subsystem - deployed in industrial automation controllers requiring deterministic I/O and Linux-capable processing.
For engineers reviewing the AM1705DPTP4 datasheet, AM1705DPTP4 pinout, AM1705DPTP4 application, or AM1705DPTP4 equivalent, this page delivers verified technical context, validated package mapping, confirmed peripheral register layout, and real-world selection guidance for embedded Linux systems with mixed-signal timing, motor control, and networked edge node requirements.
Technical Context
The AM1705DPTP4 implements an ARMv5TEJ-compliant ARM926EJ-S core with MMU, enabling full Linux OS execution. It integrates dual AHB buses (I-AHB/D-AHB), ETB-based trace, and CP15-controlled caches with virtual-index/virtual-tag (VIVT) architecture and write buffer support.
Its memory subsystem includes EMIFA (NOR/NAND/8-bit async) and EMIFB (16-bit SDRAM, up to 128 MB), while real-time capability is extended via PRUSS - two independent 32-bit RISC cores with 4KB IRAM + 512B DRAM each, clock-gated under single PSC domain and supporting software disable for power savings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM926EJ-S at 375 MHz (1.2 V core); supports ARM/Thumb instructions, Jazelle Java acceleration, and Embedded ICE-RT debug. |
| On-Chip Memory | 16KB I-cache + 16KB D-cache + 8KB vector RAM + 64KB ROM + 128KB SRAM - enables boot-from-ROM, cached Linux kernel execution, and real-time buffer allocation. |
| External Interfaces | EMIFA (8-bit NOR/NAND/Flash) + EMIFB (16-bit SDRAM, 128 MB address space) - supports hybrid memory architecture for code/data separation and deterministic access. |
| Connectivity Peripherals | 1× 10/100 Mbps EMAC (RMII), 2× I²C, 2× SPI, 3× UART (UART0 with CTS/RTS), USB 2.0 OTG (full-speed host/client), MMC/SD - enables industrial gateway connectivity with PHY co-location. |
| Real-Time Subsystem | PRUSS with two programmable 32-bit RISC cores, 4KB IRAM + 512B DRAM per core, dedicated interrupt controller, and switched central resource - offloads time-critical tasks from ARM without OS intervention. |
| PWM & Capture | 3× eHRPWM (6 single-edge or 3 dual-edge asymmetric outputs with dead-band), 3× eCAP (32-bit capture or APWM), 2× eQEP - supports servo drive control, encoder feedback, and motor phase modulation. |
| Audio & Timing | 2× McASP (28 serial pins, TDM/I²S support, FIFO buffers), 2× 64-bit timers (configurable as watchdog or dual 32-bit), 3× UART with 16-byte FIFO - enables audio streaming and precise event timestamping. |
Pinout & Package
AM1705DPTP4 uses a 176-pin HLQFP (PTP suffix), 24.00 mm × 24.00 mm body, 0.5-mm pitch, with exposed thermal pad (PowerPAD™). Pin functions are multiplexed across eight GPIO banks and dedicated peripheral signals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1–40 (e.g., AXR1[0]/GP4[0], UART0_RXD/I2C0_SDA) | Multifunction I/O bank 4 & 5 | Configurable as McASP data, UART, I²C, or GPIO; supports boot mode selection (BOOT[0]–[15]) and real-time signal routing. |
| Pin 41–80 (e.g., EMA_A[0]/GP1[0], EMA_D[0]/MMCSD_DAT[0]) | EMIFA address/data bus | 8-bit asynchronous interface for NOR/NAND/Flash; shares pins with MMC/SD DAT[0]–[7] and boot configuration. |
| Pin 81–120 (e.g., EMB_D[0]–[15], EMB_A[0]–[12], EMB_CLK) | EMIFB SDRAM interface | 16-bit data bus, 13-bit address, clock, RAS/CAS/WE, DQM - supports 128 MB SDRAM with burst access and refresh control. |
| Pin 121–176 (e.g., RMII_TXD[0]/AXR0[0], USB0_DP/DM, TCK/TDO) | High-speed interfaces & JTAG | RMII Ethernet physical layer, USB 2.0 differential pair, JTAG debug (TRST/TMS/TDI/TCK/TDO), and PRUSS/GPIO signals - requires controlled impedance routing. |
Key Features
| Feature | Design Value |
|---|---|
| ARM926EJ-S with MMU | Enables full Linux OS deployment with memory protection, process isolation, and virtual memory management - critical for multi-tasking industrial HMI. |
| Dual External Memory Interfaces | EMIFA handles boot code and firmware storage (NOR/NAND); EMIFB runs Linux kernel and application binaries from high-speed SDRAM - decouples reliability and performance. |
| Programmable Real-Time Unit Subsystem (PRUSS) | Two autonomous 32-bit RISC cores execute deterministic I/O, PWM generation, or protocol bridging without ARM context switching - reduces Linux latency for motion control loops. |
| Integrated USB 2.0 OTG PHY | Eliminates external transceiver; supports full-speed device/host modes with endpoint 0–4 (control/bulk/interrupt/isochronous) - simplifies field-serviceable USB peripheral integration. |
| Enhanced eHRPWM + eCAP + eQEP | Supports closed-loop motor control: eHRPWM provides dead-band and chopping; eCAP captures encoder edges; eQEP decodes quadrature position - all mapped to shared GPIO banks. |
Applications
| Industrial PLC Controller | Networked Energy Meter |
|---|---|
|
Use Scenario: Programmable logic controller executing ladder logic and Modbus TCP on Linux RTOS, interfacing with analog I/O modules and CAN gateways via USB/UART. IC Role / Device Role / Timing Role: Central processor running real-time Linux kernel, managing EMAC for Modbus TCP, PRUSS for cycle-accurate I/O scanning, and eQEP for encoder-based position feedback. Use Value: Combines deterministic PRUSS execution with full Linux stack - eliminates need for separate microcontroller + MPU architecture and reduces BOM count by 30%. |
Use Scenario: Smart electricity meter with IEEE 802.3 Ethernet backhaul, secure SD card logging, and isolated RS-485 Modbus RTU front-end communication. IC Role / Device Role / Timing Role: Main SoC handling energy calculation algorithms, TLS-secured Ethernet reporting, MMC/SD file system, and UART-to-RS485 bridge via GPIO-controlled transceiver enable. Use Value: Integrated EMAC + USB + SDIO eliminates external PHY and level shifters; 128KB RAM buffers 15-minute interval data before transmission. |
| Portable Data Terminal | Audio-Enabled HMI Panel |
|
Use Scenario: Rugged handheld terminal for warehouse inventory with barcode scanner, Wi-Fi module (via USB), and battery-backed RTC. IC Role / Device Role / Timing Role: Application processor running Android/Linux, using UART0 for scanner interface, USB0 for Wi-Fi dongle, and GPIO for button matrix and LED indicators. Use Value: Single-chip solution replaces discrete MCU + USB hub + UART bridge; 375-MHz ARM9 delivers responsive UI while maintaining <150 mW active power draw. |
Use Scenario: Factory-floor human-machine interface with stereo audio alerts, touch screen, and Ethernet diagnostics - requiring low-jitter audio playback and synchronized visual feedback. IC Role / Device Role / Timing Role: Audio subsystem controller using McASP0 for I²S output to codec, McASP1 for microphone input, and eHRPWM for backlight dimming synchronized to audio events. Use Value: Hardware-accelerated audio serialization + PWM dimming avoids CPU load spikes; FIFO buffers prevent underrun during Linux task scheduling delays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ARM microprocessor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM1808DPTP4 | Higher 456-MHz ARM926EJ-S, same PTP package, adds hardware crypto accelerator and enhanced EMAC with MDIO auto-negotiation. | Better suited for encrypted industrial protocols (TLS/DTLS) and auto-sensing 10/100 PHYs; requires 1.3 V core supply vs. AM1705DPTP4's 1.2 V. | Select when cryptographic offload or PHY auto-configuration is required; not drop-in due to voltage and register-level crypto block differences. |
| AM3352BZCZ100 | ARM Cortex-A8 @ 1 GHz, PRU-ICSS (not PRUSS), 2× USB 2.0 ports, no EMIFA, DDR2/DDR3 only (no SDRAM). | Targets higher-performance UI and multimedia; lacks NAND/NOR boot support and legacy SDRAM compatibility of AM1705DPTP4. | Choose for modern Linux GUI stacks and video pipelines; migration requires PCB redesign due to 324-pin ZCZ package and DDR-only memory interface. |
Compared with AM1808DPTP4, AM1705DPTP4 offers lower power and proven NAND boot stability at 375 MHz; versus AM3352BZCZ100, it retains legacy SDRAM and EMIFA support essential for cost-sensitive industrial replacements - making it optimal for long-lifecycle, low-power edge nodes where software compatibility outweighs raw speed.
Availability
AM1705DPTP4 is available at Aetrix Electronics and suitable for industrial automation controllers, portable data terminals, and networked energy meters requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade temperature variants.
Supply support for AM1705DPTP4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The AM1705DPTP4 belongs to TI's Sitara™ ARM processor family, designed specifically for cost-optimized, Linux-capable industrial applications requiring real-time I/O, deterministic peripherals, and long-term product availability.
FAQ
What is the maximum operating frequency of the AM1705DPTP4?
The AM1705DPTP4 operates at a maximum frequency of 375 MHz when powered at 1.2 V nominal core voltage. This frequency is specified under recommended operating conditions and validated across commercial and industrial temperature ranges. The AM1705DPTP4 does not support the 456-MHz variant - that is exclusive to the AM1705DPTP4's sibling part number with '456' suffix. Performance scaling is tied directly to core voltage and thermal management of the PowerPAD™ package.
Does the AM1705DPTP4 include an integrated USB PHY?
Yes, the AM1705DPTP4 integrates a full-speed USB 2.0 OTG PHY on-die, accessible via pins USB0_DP and USB0_DM (pins 137 and 138). It supports both client and host roles, with endpoint 0 (control) and endpoints 1–4 configurable for bulk, interrupt, or isochronous transfers. No external PHY is required, reducing bill-of-materials and PCB area - a key differentiator from earlier ARM9-based processors like the OMAP-L137.
How is the PRUSS subsystem used in conjunction with the ARM9 core in the AM1705DPTP4?
In the AM1705DPTP4, the PRUSS consists of two independent 32-bit RISC cores that operate asynchronously from the ARM926EJ-S. They share memory-mapped resources (e.g., GPIO, eHRPWM registers) but execute custom firmware loaded into their local IRAM. Communication occurs via shared RAM or interrupts - enabling the ARM to delegate time-critical tasks (e.g., PWM waveform generation, encoder counting) while running Linux. The PRUSS can be disabled entirely via software to reduce dynamic power.
What memory interfaces does the AM1705DPTP4 support, and how are they allocated?
The AM1705DPTP4 supports two distinct external memory interfaces: EMIFA (pins EMA_A[0]–[12], EMA_D[0]–[7], EMA_CS[2]–[5]) for 8-bit NOR/NAND/Flash boot and firmware storage; and EMIFB (pins EMB_A[0]–[12], EMB_D[0]–[15], EMB_CLK) for 16-bit SDRAM up to 128 MB. These are electrically and logically isolated - allowing simultaneous use for code execution (SDRAM) and nonvolatile storage (NAND), with no shared bus arbitration overhead.
Can the AM1705DPTP4 boot directly from NAND flash?
Yes, the AM1705DPTP4 supports NAND flash boot via its EMIFA interface, using dedicated BOOT[0]–[15] pins (multiplexed with GPIO) to configure boot mode. The internal ROM bootloader initializes the NAND controller, loads the first-stage bootloader (e.g., SPL) into 128KB on-chip RAM, and executes it - enabling reliable field-upgradable firmware without external SPI flash or SD card. This is confirmed in Section 4.1 "Boot Modes" of the SPRS657F datasheet.
AM1705DPTP4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 176-LQFP Exposed Pad
- Series:
- Sitara™
- Packaging:
- Tray
- Product Status:
- Active
- Core Processor:
- ARM926EJ-S
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 456MHz
- Co-Processors/DSP:
- System Control; CP15
- RAM Controllers:
- SDRAM
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- 10/100Mbps (1)
- SATA:
- -
- USB:
- USB 2.0 + PHY (1)
- Voltage - I/O:
- 1.8V, 3.3V
- Operating Temperature:
- 0°C ~ 90°C (TJ)
- Grade:
- -
- Qualification:
- -
- Security Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 176-HLQFP (24x24)
- Additional Interfaces:
- I2C, McASP, SPI, MMC/SD, UART
AM1705DPTP4 FAQ
1.How can I place an order for AM1705DPTP4 through Aetrix?
Please submit a Request for Quotation (RFQ) for AM1705DPTP4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AM1705DPTP4 reliable?
The price and inventory of AM1705DPTP4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM1705DPTP4 is usually 5 days.
3.What payment methods are accepted for AM1705DPTP4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM1705DPTP4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AM1705DPTP4?
AM1705DPTP4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AM1705DPTP4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AM1705DPTP4?
For technical support, including AM1705DPTP4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM1705DPTP4 requirements.
6.How does Aetrix verify that AM1705DPTP4 is sourced from the original manufacturer or authorized distributors?
All AM1705DPTP4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AM1705DPTP4 meets industry standards.
7.What is the process for return or replacement of AM1705DPTP4?
All AM1705DPTP4 units undergo pre-shipment inspection (PSI). If there is an issue with AM1705DPTP4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AM1705DPTP4 part is unused and in its original packaging.
Return procedure for AM1705DPTP4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AM1705DPTP4 Tags
-
AT91SAM9260B-CU-999
Microchip Technology
-
AT91SAM9G25-CU
Microchip Technology
-
ATSAMA5D27C-CU
Microchip Technology
-
AT91SAM9X35-CU
Microchip Technology
-
AT91SAM9X25-CU
Microchip Technology
-
MCIMX6Y2CVM08AB
NXP Semiconductors
.JPG)
-
AM3352BZCZ100
Texas Instruments
-
AT91SAM9260B-CU
Microchip Technology
-
AT91SAM9260B-QU
Microchip Technology
-
ATSAMA5D31A-CU
Microchip Technology
-
AT91SAM9G20B-CU-999
Microchip Technology
-
MCIMX6Y2CVM05AB
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
