MPC852TVR66A

Overview

The MPC852TVR66A is a PowerQUICC III derivative microprocessor built on the MPC8xx core. It operates at a maximum core frequency of 66 MHz with an external bus speed of 33 MHz in 2:1 mode, or up to 66 MHz in 1:1 mode. The device utilizes a 0.18-micron process with a 1.8-V core voltage (VDDL) and 3.3-V I/O voltage (VDDH). Key specifications include a 4-Kbyte instruction cache, a 4-Kbyte data cache, and a 32-entry TLB. It integrates a Fast Ethernet Controller (FEC), a Communications Processor Module (CPM) with 8-Kbytes dual-port RAM, and supports PCMCIA interfaces.

Feature Summary

• Integrates a 32-bit RISC controller with a Communications Processor Module (CPM) featuring eight serial DMA channels and 8-Kbytes of dual-port RAM for efficient data handling.
• Includes a dedicated Fast Ethernet Controller (FEC) supporting full 10-Mbps operation via MII interface for network connectivity.
• Features a System Integration Unit (SIU) providing memory controllers for DRAM/SRAM/Flash, general-purpose timers, and a clock synthesizer.
• Supports multiple communication protocols including HDLC, SDLC, UART, and SPI through Serial Communication Controllers (SCCs) and Serial Management Channels (SMCs).

Applications

• Ethernet routers and hubs
• VoIP clients
• WiFi access points
• CPE equipment

Procurement Notes

Verify that the specific suffix 'VR66A' corresponds to the 66 MHz core frequency variant as documented in the MPC852TEC datasheet. Confirm package type and temperature range requirements against the ordering information section. Ensure power supply sequencing circuits are designed to maintain VDDL below VDDH during ramp-up to prevent ESD diode conduction. Check for any mandatory reset configuration values required by the boot code.

Selection Notes

Select this component for applications requiring integrated Ethernet control and high-speed serial processing within a single chip. The MPC852T offers a balance of processing power and peripheral integration suitable for embedded networking tasks. Consider the 1.8-V core and 3.3-V I/O levels when designing power rails. Evaluate thermal dissipation requirements based on the expected operating frequency and ambient conditions using the provided thermal resistance data.

Part Context

The MPC852T belongs to the Freescale Semiconductor PowerQUICC III family, which is derived from the MPC860 Quad Integrated Communications Controller. This family targets communication-intensive applications, combining a PowerPC-compatible processor core with specialized peripherals like the CPM and FEC. The MPC852T represents a subset of this family, optimized for cost-effective solutions in Ethernet-based systems.

Replacement Considerations

Consult the MPC852TEC datasheet errata and product summary page for potential substitutes. Similar parts in the PowerQUICC family may offer different feature sets or frequencies. Verify pin compatibility and software support before transitioning to alternative components.