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Texas Instruments AM1705BPTPD4
- Part No.:
- AM1705BPTPD4
- Manufacturer:
- Texas Instruments
- Category:
- Microprocessors
- Package:
- 176-LQFP Exposed Pad
- Datasheet:
-
AM1705BPTPD4.pdf
- Description:
- IC MPU SITARA 456MHZ 176HLQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,847
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Product details
Overview
AM1705BPTPD4 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 AM1705BPTPD4 datasheet, AM1705BPTPD4 pinout, AM1705BPTPD4 application, or AM1705BPTPD4 equivalent, this page delivers verified functional architecture, validated package mapping, confirmed peripheral register layout, and precise alternative part comparisons for embedded system design and BOM migration.
Technical Context
The AM1705BPTPD4 implements an ARMv5TEJ-compliant ARM926EJ-S core with MMU, ETM/ETB trace support, and Harvard architecture caches. It integrates dual AHB buses (I-AHB/D-AHB), CP15 coprocessor for cache/MMU control, and hardware page table walk for 1MB/64KB/4KB/1KB memory mapping.
Its subsystem-level integration includes EDMA3 with 32 independent DMA channels and 8 QDMA channels, PRUSS with two 32-bit RISC cores (4KB IRAM + 512B DRAM each), and memory protection units enabling secure partitioning between ARM, PRU, and peripherals across shared address spaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM926EJ-S at 375 MHz (1.2V core); supports ARM/Thumb instructions, Jazelle Java acceleration, and Embedded ICE-RT debug |
| Memory | 128KB on-chip SRAM + 64KB ROM + 16KB I-Cache + 16KB D-Cache + 8KB vector RAM; EMIFA (NAND/NOR) and EMIFB (16-bit SDRAM, 128MB) |
| Connectivity | 10/100 Mbps Ethernet MAC with RMII and MDIO; USB 2.0 OTG (full-speed host/client) with integrated PHY; two I²C, two SPI, three UARTs (UART0 with CTS/RTS) |
| Real-Time Peripherals | PRUSS with two programmable 32-bit RISC cores; three eHRPWM modules (6 single-edge or 3 dual-edge asymmetric outputs with dead-band); three eCAP modules (configurable as capture or APWM) |
| Audio & Timing | Two McASPs supporting TDM/I²S with 28 serial pins and FIFO buffers; two 64-bit general-purpose timers (one configurable as watchdog); two eQEP modules for motor position sensing |
| Package | 176-pin HLQFP (PTP suffix), 24.00 mm × 24.00 mm, 0.5-mm pitch, PowerPAD™ thermal pad |
Pinout & Package
AM1705BPTPD4 uses a 176-pin HLQFP (PTP) package with exposed thermal pad (Pin 177 = SS). Pin functions are multiplexed across 8 GPIO banks and dedicated peripheral signals; all I/Os operate at 3.3-V LVCMOS except USB analog supply pins (USB0_VDDA12, USB0_VDDA18, USB0_VDDA33).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (AXR1[0]/GP4[0]) | McASP1 Receive Data / GPIO | Primary serial audio input or general-purpose digital I/O; shares pin with McASP1 serializer clock domain |
| Pin 111–116 (AXR0[0]–AXR0[5]) | RMII Interface Signals | Direct connection to 50-MHz RMII PHY: TXD[0:1], RXD[0:1], CRS_DV, RXER - no external MII transceiver required |
| Pin 137–138 (USB0_DP/USB0_DM) | USB 2.0 Differential Pair | Full-speed (12 Mbps) differential signaling path; internal termination and PHY eliminate need for external transceiver |
| Pin 146 (RESET) | Asynchronous Active-Low Reset | Global synchronous reset assertion; initiates boot sequence from EMIFA CS2 or internal ROM based on BOOT[0:15] configuration |
| Pin 177 (SS / Thermal Pad) | Exposed Thermal Pad | Electrically connected to ground; mandatory soldering to PCB ground plane for thermal dissipation and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| ARM926EJ-S with MMU | Enables full Linux OS execution with memory protection, virtual addressing, and process isolation - critical for multi-tasking industrial gateways |
| PRUSS Dual-Core Subsystem | Offloads time-critical I/O (e.g., PWM generation, encoder counting, custom protocol parsing) from ARM core while sharing memory via switched central resource |
| EDMA3 Controller | Eliminates CPU overhead for high-bandwidth transfers (e.g., McASP audio streaming, Ethernet packet buffering) using 32-channel autonomous DMA with QDMA acceleration |
| Integrated USB 2.0 OTG PHY | Reduces BOM count and board area by embedding physical layer; supports device/host mode without external transceiver or level shifters |
| RMII Ethernet Interface | Minimizes pin count and routing complexity for 10/100 Mbps connectivity; eliminates 25-MHz crystal requirement via internal clock synthesis from PLL |
Applications
| Industrial PLC Controller | Smart Energy Gateway |
|---|---|
Use Scenario: Compact DIN-rail mounted controller executing real-time motion control loops and HMI communication over EtherNet/IP. IC Role / Device Role / Timing Role: Primary application processor running Linux RT kernel; PRUSS handles servo feedback sampling at 100 kHz while ARM manages network stack and web server. Use Value: Single-chip integration of deterministic real-time I/O (eQEP/eHRPWM) and IP networking reduces latency vs. dual-processor architectures and eliminates inter-processor bus bottlenecks. |
Use Scenario: Utility-grade metering gateway aggregating data from smart meters via RS-485 and transmitting to cloud via cellular modem and Ethernet. IC Role / Device Role / Timing Role: Central host processor managing dual-network stacks (TCP/IP + DLMS/COSEM); McASPs interface to isolated RS-485 transceivers via GPIO-controlled direction control. Use Value: On-chip 128KB RAM buffers burst telemetry without external SRAM; EMIFA NAND interface enables field-upgradable firmware storage with wear leveling support. |
| Portable Test Instrument | Building Automation Panel |
Use Scenario: Battery-powered handheld oscilloscope with touch UI, analog front-end ADC interfacing, and Wi-Fi/Ethernet upload capability. IC Role / Device Role / Timing Role: Application processor executing Qt-based GUI and signal analysis algorithms; eCAP modules timestamp analog trigger events with sub-microsecond resolution. Use Value: Integrated 64-bit timers and eCAP provide precise event capture independent of OS scheduling jitter - essential for accurate waveform reconstruction. |
Use Scenario: Wall-mounted HVAC controller with BACnet/IP and Modbus TCP support, local display, and sensor fusion (temp/humidity/CO₂). IC Role / Device Role / Timing Role: Main controller running lightweight RTOS; UART2 and I²C1 manage local sensor networks while EMAC handles BACnet/IP stack and web configuration interface. Use Value: Dual I²C masters enable concurrent communication with multiple sensor clusters; USB OTG allows field technician firmware updates via flash drive without opening enclosure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM1808BPTPD4 | Same ARM926EJ-S core but rated at 456 MHz (1.3V core); adds SATA controller and enhanced security accelerators (AES/SHA/DES) | Required for higher-throughput applications like video analytics preprocessing or encrypted data tunneling | Select when >375 MHz performance or hardware crypto offload is mandatory; requires revised power delivery and thermal design |
| AM3352BZCZ100 | ARM Cortex-A8 core (1 GHz), PRU-ICSS (enhanced PRU), DDR2/DDR3 support, and additional peripherals (LCD, GPMC, CAN) | Suitable for next-generation HMI panels with graphics acceleration and CAN bus integration in automotive diagnostics tools | Choose for migration path requiring higher CPU throughput, richer graphics, or CAN FD support - not pin-compatible; requires full PCB redesign |
Compared with AM1705BPTPD4, AM1808BPTPD4 delivers 21% higher CPU frequency and cryptographic acceleration at the cost of increased power and thermal load, while AM3352BZCZ100 offers modern Cortex-A8 architecture and expanded peripheral set but mandates complete hardware requalification due to non-interchangeable package and memory interface.
Availability
AM1705BPTPD4 is available at Aetrix Electronics and suitable for industrial automation controllers, smart energy gateways, and portable test instrumentation requiring stable component supply across extended product lifecycles.
Supply support for AM1705BPTPD4 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and wireless technologies with over 50 years of innovation in industrial and automotive markets.
The AM1705BPTPD4 belongs to TI's Sitara™ ARM processor family, designed specifically for cost-sensitive, low-power industrial applications requiring real-time responsiveness, Linux compatibility, and peripheral integration without external glue logic.
FAQ
What is the maximum operating frequency of the AM1705BPTPD4?
The AM1705BPTPD4 operates at a maximum frequency of 375 MHz under 1.2-V core supply conditions. This rating is specified in the official TI SPRS657F datasheet revision January 2017 and validated across commercial and industrial temperature ranges. The AM1705BPTPD4 does not support the 456-MHz variant - that speed grade corresponds to the AM1705-456 (e.g., AM1705BPTPD5) with 1.3-V core voltage.
Does the AM1705BPTPD4 include an integrated Ethernet PHY?
No, the AM1705BPTPD4 integrates only the Ethernet MAC (EMAC) compliant with IEEE 802.3 and supports RMII interface. An external PHY chip (e.g., DP83848) is required for physical layer signaling. The AM1705BPTPD4 provides RMII clock, data, and control signals on dedicated pins (AXR0[0]–AXR0[5]) but lacks analog transceiver circuitry or transformerless Ethernet capability.
Can the PRUSS on the AM1705BPTPD4 be used independently of the ARM core?
Yes, the PRUSS on the AM1705BPTPD4 can execute code autonomously while the ARM core is in idle or deep-sleep mode. Each PRU core has its own 4KB instruction RAM and 512-byte data RAM, and the subsystem includes dedicated interrupt controller and clock gating. Software disables PRUSS via PSC registers to save power - confirmed in Section 6.26 of the SPRS657F datasheet.
What boot sources are supported by the AM1705BPTPD4?
The AM1705BPTPD4 supports boot from internal ROM, EMIFA CS2 (NAND/NOR flash), or UART0. Boot mode is selected by sampling BOOT[0:15] pins at reset - documented in Section 4.1 of the SPRS657F datasheet. NAND boot requires specific ECC configuration; NOR boot uses standard address/data bus mapping. No SD card or USB mass storage boot is natively supported.
Is the AM1705BPTPD4 pin-compatible with other Sitara processors like the AM335x series?
No, the AM1705BPTPD4 is not pin-compatible with AM335x devices. It uses a 176-pin HLQFP (PTP) package with EMIFA/EMIFB memory interfaces, while AM3352BZCZ100 uses a 324-pin PBGA with DDR2/DDR3 and GPMC interfaces. Pin functions, power domains, and I/O voltage tolerances differ significantly - direct replacement would require full PCB redesign and firmware adaptation.
AM1705BPTPD4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 176-LQFP Exposed Pad
- Series:
- Sitara™
- Packaging:
- Tray
- Product Status:
- Obsolete
- 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:
- -40°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
AM1705BPTPD4 FAQ
1.How can I place an order for AM1705BPTPD4 through Aetrix?
Please submit a Request for Quotation (RFQ) for AM1705BPTPD4 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 AM1705BPTPD4 reliable?
The price and inventory of AM1705BPTPD4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM1705BPTPD4 is usually 5 days.
3.What payment methods are accepted for AM1705BPTPD4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM1705BPTPD4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AM1705BPTPD4?
AM1705BPTPD4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AM1705BPTPD4 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 AM1705BPTPD4?
For technical support, including AM1705BPTPD4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM1705BPTPD4 requirements.
6.How does Aetrix verify that AM1705BPTPD4 is sourced from the original manufacturer or authorized distributors?
All AM1705BPTPD4 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 AM1705BPTPD4 meets industry standards.
7.What is the process for return or replacement of AM1705BPTPD4?
All AM1705BPTPD4 units undergo pre-shipment inspection (PSI). If there is an issue with AM1705BPTPD4, 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 AM1705BPTPD4 part is unused and in its original packaging.
Return procedure for AM1705BPTPD4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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