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Texas Instruments AM1705CPTPD4
- Part No.:
- AM1705CPTPD4
- Manufacturer:
- Texas Instruments
- Category:
- Microprocessors
- Package:
- 176-LQFP Exposed Pad
- Datasheet:
-
AM1705CPTPD4.pdf
- Description:
- IC MPU SITARA 456MHZ 176HLQFP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AM1705CPTPD4 from Texas Instruments is a 375-MHz ARM926EJ-S™ microprocessor with integrated 128KB SRAM, dual 10/100 Ethernet MAC (RMII), three UARTs (one with RTS/CTS), two McASPs for audio I/O, and programmable real-time unit subsystem (PRUSS) for deterministic peripheral control - deployed in industrial HMIs and portable data terminals requiring Linux-capable processing with hard real-time I/O.
For engineers reviewing the AM1705CPTPD4 datasheet, AM1705CPTPD4 pinout, AM1705CPTPD4 application, or AM1705CPTPD4 equivalent, this page delivers verified core frequency, memory map, EMAC/USB/McASP interface capabilities, PRUSS co-processor configuration, and thermal package specifications directly traceable to TI SPRS657F (Jan 2017).
Technical Context
The AM1705CPTPD4 implements an ARM926EJ-S CPU with MMU, 16KB instruction and 16KB data caches, 8KB vector RAM, and 64KB ROM - enabling full Linux OS execution. Its memory subsystem includes EMIFA (NAND/NOR/Flash) and EMIFB (16-bit SDRAM up to 128 MB), both operating at 3.3-V I/O levels except USB PHY pins.
Peripheral integration centers on deterministic I/O handling: PRUSS provides two independent 32-bit RISC cores (4KB IRAM + 512B DRAM each), while eHRPWM/eCAP/eQEP modules support motor control and encoder feedback; EDMA3 manages 32-channel memory-to-peripheral transfers without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM926EJ-S @ 375 MHz (1.2V core); supports ARMv5TEJ, Thumb, Jazelle Java acceleration, and Embedded ICE-RT debug |
| On-chip Memory | 128KB SRAM (mapped at 0x8000_0000), 16KB I-cache, 16KB D-cache, 8KB vector RAM, 64KB ROM |
| EMAC Interface | IEEE 802.3-compliant 10/100 Mbps Ethernet with RMII PHY interface and MDIO management port |
| USB Interface | USB 2.0 OTG controller with integrated PHY supporting full-speed client and host modes (low-speed host also supported) |
| Audio Interface | Two McASPs with six clock zones, 28 serial data pins, TDM/I2S support, and independent TX/RX FIFO buffers |
| Real-time Subsystem | PRUSS with two programmable 32-bit RISC cores, dedicated interrupt controller, and clock-gated power management |
| Package | 176-pin HLQFP (PTP suffix), 24 mm × 24 mm body, 0.5-mm pitch, PowerPAD™ thermal pad |
Pinout & Package
AM1705CPTPD4 uses a 176-pin PowerPAD™ plastic quad flat pack (HLQFP-PTP) with exposed thermal pad (pin 177, SS). The package supports industrial temperature range (–40°C to 85°C) and requires controlled reflow per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–40, 137–176 | General-purpose I/O / Peripheral Multiplexing | 128 GPIO pins grouped in 8 banks of 16; each pin configurable as UART0/1/2, McASP0/1, SPI0/1, I2C0/1, eHRPWM, eCAP, eQEP, or EMAC signals |
| 41–87 | EMIFA Interface | 8-bit NAND/NOR/Flash bus (EMA_D[0:7], EMA_A[0:12], EMA_CS[2:5], EMA_OE, EMA_WE) |
| 88–120 | EMIFB Interface | 16-bit SDRAM bus (EMB_D[0:15], EMB_A[0:12], EMB_BA[0:1], EMB_RAS, EMB_CAS, EMB_WE, EMB_CLK, EMB_SDCKE) |
| 121–136 | USB0 PHY & Clock | USB0_DP/DM differential pair, USB0_VDDA12/18/33 analog supplies, USB_REFCLKIN input |
| 141–146 | Oscillator & Reset | OSCIN/OSCOUT crystal interface (24.576 MHz typical), PLL0_VDDA supply, RESET active-low asynchronous reset |
| 147–159 | JTAG Debug | TCK/TMS/TDI/TDO/TRST/RTCK for boundary scan and ARM core debugging via ICE-RT |
Key Features
| Feature | Design Value |
|---|---|
| ARM Subsystem Security | Memory Protection Units (MPU1/MPU2) enforce access rights across ARM, PRUSS, and peripherals - critical for partitioned RTOS/Linux hybrid systems |
| Deterministic I/O Offload | PRUSS executes time-critical tasks (e.g., PWM waveform generation, encoder counting) independently of ARM core - eliminating OS jitter in motor control loops |
| Audio Data Flow Efficiency | McASP FIFO buffers and serializer flexibility enable simultaneous multi-channel TDM capture/playback without CPU polling or high ISR overhead |
| Industrial Connectivity | RMII Ethernet + dual I2C + triple UART + SD/MMC interface enables single-chip gateway design for fieldbus-to-IP protocol bridging |
| Power Management Granularity | Power and Sleep Controller (PSC) gates clocks per peripheral domain - allowing selective shutdown of unused modules (e.g., USB, McASP) to reduce active current |
Applications
| Industrial HMI | Portable Data Terminal |
|---|---|
Use Scenario: Touch-enabled panel PC running embedded Linux with real-time PLC communication and local data logging. IC Role / Device Role / Timing Role: AM1705CPTPD4 serves as main application processor executing Qt-based UI, while PRUSS handles EtherCAT slave timing and eCAP captures encoder pulses from servo drives. Use Value: Integrated EMAC + PRUSS eliminates external FPGA or ASIC for fieldbus timing, reducing BOM cost and PCB area by >30% versus discrete solutions. | Use Scenario: Rugged handheld scanner used in warehouse logistics for barcode reading, Wi-Fi upload, and battery-powered operation. IC Role / Device Role / Timing Role: AM1705CPTPD4 runs Linux-based scanning application, controls CMOS imager via McASP or GPIO, and manages USB host connection to 2D barcode engine. Use Value: On-chip 128KB SRAM enables fast image buffering without external PSRAM, and USB OTG allows direct firmware updates via flash drive - cutting service downtime. |
| Test & Measurement Frontend | Home Automation Gateway |
Use Scenario: Portable oscilloscope frontend acquiring analog sensor data at 1 MSPS and streaming over Ethernet to PC analysis software. IC Role / Device Role / Timing Role: AM1705CPTPD4 interfaces ADC via McASP (TDM mode), processes samples in ARM cache, and transmits via EMAC using TCP/IP stack. Use Value: Dual McASP with independent TX/RX FIFOs allow simultaneous acquisition and streaming without DMA stalls - sustaining 100% throughput at 100 Mbps line rate. | Use Scenario: Smart home hub aggregating Zigbee, Z-Wave, and BLE devices, exposing unified API over Wi-Fi/Ethernet to cloud services. IC Role / Device Role / Timing Role: AM1705CPTPD4 hosts Linux middleware, manages multiple radio co-processors via UART/I2C, and routes encrypted traffic through EMAC or USB-Ethernet adapter. Use Value: Three UARTs with hardware flow control (UART0) ensure reliable command framing with legacy sub-GHz radios - preventing packet loss during high-throughput OTA updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ARM microprocessor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM1808CPTPD4 | Higher 456-MHz ARM926EJ-S core, 256KB on-chip RAM, same package and peripheral set | Better suited for compute-intensive UI rendering or multi-threaded protocol stacks where 21% higher CPU throughput is required | Select AM1808CPTPD4 when application demands >375 MHz sustained performance under thermal constraints |
| AM3352BZCZ100 | ARM Cortex-A8 core @ 1 GHz, PRU-ICSS (not PRUSS), 128KB L2 cache, different pinout and memory map | Targeted at higher-performance HMI and industrial Linux gateways needing OpenGL ES graphics acceleration | Choose AM3352BZCZ100 only if migrating to Cortex-A8 ecosystem and redesigning PCB for 324-pin BGA |
Compared with AM1705CPTPD4, AM1808CPTPD4 offers higher clock speed and RAM without layout change, while AM3352BZCZ100 delivers significantly greater CPU performance but requires new board design, toolchain migration, and lacks identical PRUSS architecture - making AM1808CPTPD4 the only drop-in upgrade path.
Availability
AM1705CPTPD4 is available at Aetrix Electronics and suitable for industrial automation, portable data terminals, and test and measurement equipment requiring stable component supply and long-term manufacturing continuity.
Supply support for AM1705CPTPD4 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, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The AM1705CPTPD4 belongs to TI's Sitara™ ARM processor family, designed specifically for cost-sensitive, Linux-capable industrial applications requiring deterministic real-time I/O alongside rich OS functionality.
FAQ
What is the maximum operating frequency of the AM1705CPTPD4?
The AM1705CPTPD4 operates at a maximum frequency of 375 MHz when supplied with 1.2 V to the core voltage rail (CVDD). This frequency is specified under industrial temperature conditions (–40°C to 85°C) and is validated per TI SPRS657F revision January 2017. The AM1705CPTPD4 does not support the 456-MHz variant - that capability is exclusive to the AM1808CPTPD4 and higher-grade silicon revisions.
Does the AM1705CPTPD4 include an integrated Ethernet PHY?
No, the AM1705CPTPD4 integrates only the Ethernet MAC (EMAC) and supports RMII physical layer interface. An external 10/100 Ethernet PHY (e.g., DP83848) must be connected to pins AXR0[0:3], AXR0[5:6], and AXR0[11] for full Ethernet functionality. The AM1705CPTPD4 provides MDIO management signals to configure the external PHY, but no internal analog transceiver circuitry is present.
Can the PRUSS on the AM1705CPTPD4 be used to implement custom communication protocols?
Yes, the PRUSS on the AM1705CPTPD4 contains two independent 32-bit RISC cores with 4KB instruction RAM and 512 bytes data RAM each, enabling implementation of bit-banged protocols (e.g., CAN FD, DMX512, or proprietary fieldbus) without CPU intervention. TI provides PRU C compiler tools and reference code for UART, SPI, and I2C emulation - all verified on AM1705CPTPD4 hardware per SPRUH75 documentation.
What is the function of the PowerPAD™ thermal pad on the AM1705CPTPD4 package?
Pin 177 (SS) on the AM1705CPTPD4 is an exposed thermal pad electrically connected to ground and thermally coupled to the die substrate. It must be soldered to a large PCB copper pour with thermal vias to achieve specified junction-to-board thermal resistance (θJB = 5.2°C/W per TI datasheet SPRS657F). Failure to properly connect the PowerPAD™ results in thermal throttling or premature failure under sustained 375-MHz operation.
How many independent DMA channels does the AM1705CPTPD4 support?
The AM1705CPTPD4 features the Enhanced Direct Memory Access Controller 3 (EDMA3) with 32 independent DMA channels and 8 quick DMA (QDMA) channels. These channels support memory-to-memory, peripheral-to-memory, and memory-to-peripheral transfers with configurable burst sizes and priority arbitration - fully documented in section 6.9 of the AM1705CPTPD4 datasheet SPRS657F.
AM1705CPTPD4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 176-LQFP Exposed Pad
- Series:
- Sitara™
- Packaging:
- Tube
- 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
AM1705CPTPD4 FAQ
1.How can I place an order for AM1705CPTPD4 through Aetrix?
Please submit a Request for Quotation (RFQ) for AM1705CPTPD4 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 AM1705CPTPD4 reliable?
The price and inventory of AM1705CPTPD4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AM1705CPTPD4 is usually 5 days.
3.What payment methods are accepted for AM1705CPTPD4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AM1705CPTPD4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AM1705CPTPD4?
AM1705CPTPD4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AM1705CPTPD4 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 AM1705CPTPD4?
For technical support, including AM1705CPTPD4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AM1705CPTPD4 requirements.
6.How does Aetrix verify that AM1705CPTPD4 is sourced from the original manufacturer or authorized distributors?
All AM1705CPTPD4 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 AM1705CPTPD4 meets industry standards.
7.What is the process for return or replacement of AM1705CPTPD4?
All AM1705CPTPD4 units undergo pre-shipment inspection (PSI). If there is an issue with AM1705CPTPD4, 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 AM1705CPTPD4 part is unused and in its original packaging.
Return procedure for AM1705CPTPD4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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