NXP Semiconductors MPC852TVR66A

Overview

MPC852TVR66A from Freescale Semiconductor is a PowerPC architecture-based integrated communications controller featuring an MPC8xx core operating up to 100 MHz with 66-MHz external bus support, 1.8-V core/3.3-V I/O voltage operation, and integrated Fast Ethernet Controller (FEC), CPM, and SIU. It serves as a single-chip solution for embedded networking control in CPE equipment, Ethernet routers, VoIP clients, and WiFi access points.

For engineers reviewing the MPC852TVR66A datasheet, MPC852TVR66A pinout, MPC852TVR66A application, or MPC852TVR66A equivalent, key selection criteria include its 66-MHz bus timing compliance, 1.8-V core power domain, 5-V tolerant I/O pins (e.g., PA[0:3], PD[3:15]), FEC interface capability, and mandatory reset configuration requirements per HRCW and SIUMCR registers.

Technical Context

The MPC852TVR66A implements a single-issue 32-bit MPC8xx core with 4-Kbyte instruction and data caches (two-way set-associative, 128 sets), MMU with 32-entry TLB supporting 4/16/512 KB and 8 MB page sizes, and integrated System Integration Unit (SIU) providing clock synthesis, watchdog, PIT, and IEEE 1149.1 JTAG test access.

Its Communication Processor Module (CPM) includes an 8-Kbyte dual-port RAM, eight serial DMA channels, two SCCs supporting HDLC/UART/Ethernet (SCC3/SCC4), one SMC, one SPI, and PCMCIA-ATA interface compliant with Release 2.1 - all interconnected via a unified 32-bit internal bus architecture.

Key Specifications

Pinout & Package

The MPC852TVR66A is packaged in a 256-pin PBGA (Plastic Ball Grid Array) with 1.27-mm pitch, RoHS-compliant, thermally enhanced construction. Pin mapping follows Freescale's standard MPC852T ballout layout per Document MPC852TEC Rev. 4.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar integrated communications controller applications.

Compared with MPC852TVR66A, MPC866PZQ66D offers expanded peripheral set at higher power and complexity, while MPC823EZQ66D provides functional subset at lower cost and identical package - making MPC852TVR66A the optimal balance of Ethernet integration, power efficiency, and legacy compatibility for mid-tier CPE.

Availability

MPC852TVR66A is available at Aetrix Electronics and suitable for DSL modems, VoIP terminals, Ethernet routers, and WiFi access points requiring stable component supply across extended product lifecycles.

Supply support for MPC852TVR66A 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

Freescale Semiconductor (now part of NXP Semiconductors) designed high-performance PowerQUICC processors for embedded networking and communications infrastructure.

The MPC852TVR66A belongs to the PowerQUICC™ family, engineered specifically for cost-optimized, low-power integrated communications controllers targeting residential and SMB networking equipment.

FAQ

What is the maximum supported external bus frequency for the MPC852TVR66A?

The MPC852TVR66A supports a maximum external bus frequency of 66 MHz in 2:1 mode (where core runs at 132 MHz) or 1:1 mode (core at 66 MHz). Per Table 7 and 8 in MPC852TEC Rev. 4, 66-MHz bus operation is validated with timing margins for setup/hold and valid windows across all load conditions. The MPC852TVR66A must be configured in 2:1 mode for core frequencies above 66 MHz.

Does the MPC852TVR66A support 5-V tolerant I/O, and which pins are rated for it?

Yes, the MPC852TVR66A has 32+ 5-V tolerant pins including PA[0:3], PA[8:11], PB15, PB[24:25], PB[28:31], PC[4:7], PC[12:13], PC15, PD[3:15], TDI, TDO, TCK, TRST, TMS, MII_TXEN, and MII_MDIO. As specified in Table 5 and Section 9, these pins tolerate up to 5.5 V but must never exceed VDDH + 2.5 V - a critical constraint during power-up and hot-swap scenarios.

What are the mandatory reset configuration requirements for the MPC852TVR66A?

The MPC852TVR66A requires HRCW[DBGC] = X1 and SIUMCR[DBGC] = X1 to be programmed in boot code after reset deassertion, as defined in Table 6. If RSTCONF is asserted during HRESET, the hardware reset configuration word loads DBGC from HRCW; otherwise, SIUMCR must be written explicitly. Failure to configure DBGC correctly disables debug features and may cause unpredictable boot behavior in development environments.

How does the MPC852TVR66A manage power sequencing between VDDL and VDDH rails?

The MPC852TVR66A mandates that VDDL must not exceed VDDH during power-on reset or power-down to prevent forward-biasing of internal ESD protection diodes. Section 9 of MPC852TEC Rev. 4 specifies use of Schottky diodes (e.g., MUR420) in series with VDDL and standard diodes (e.g., 1N5820) on VDDH to enforce this sequencing. Violation risks cumulative damage and field failures, especially under thermal stress.

Can the MPC852TVR66A operate in extended temperature range, and what is the junction limit?

Yes, the MPC852TVR66A supports extended temperature operation with ambient range –40 °C to +85 °C and maximum junction temperature of 100 °C, as stated in Table 2. Thermal design must account for RθJB = 24 °C/W and RθJC = 13 °C/W (Table 3); sustained FEC + CPM activity at 100 MHz core requires active cooling or derating to maintain TJ ≤ 100 °C per JEDEC JESD51-2 validation.