NXP Semiconductors MPC852TCVR80A

Overview

MPC852TCVR80A from Freescale Semiconductor is a PowerPC architecture-based integrated communications controller featuring an MPC8xx core operating at up to 80 MHz, 66-MHz external bus, 1.8-V core/3.3-V I/O with 5-V TTL compatibility, and integrated Fast Ethernet Controller (FEC), CPM, and memory controller. 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 MPC852TCVR80A datasheet, MPC852TCVR80A pinout, MPC852TCVR80A application, or MPC852TCVR80A equivalent, key selection criteria include confirmed 80 MHz core frequency in 2:1 bus mode, FEC support for IEEE 802.3 10-Mbps operation on SCC3/SCC4, dual-port RAM size (8 KB), cache configuration (4-KB instruction + 4-KB data, two-way set-associative), and mandatory reset configuration of SIUMCR[DBGC] and HRCW[DBGC].

Technical Context

The MPC852TCVR80A implements a single-issue 32-bit MPC8xx core with MMU (32-entry fully associative TLB), 4-KB physically addressed instruction and data caches, and branch prediction without conditional execution. Its system integration unit (SIU) provides clock synthesis, JTAG debug interface, periodic interrupt timer, and software watchdog.

The communications processor module (CPM) operates independently via a 32-bit RISC controller with 8-KB dual-port RAM, eight serial DMA channels, and support for HDLC/SDLC, UART, and transparent bit/frame modes across two SCCs and one SMC. The FEC supports MII interface and 10-Mbps Ethernet per IEEE 802.3.

Key Specifications

Pinout & Package

The MPC852TCVR80A is housed in a 352-pin PBGA package (19 mm × 19 mm, 1.27 mm pitch) with thermal pad. Pin functions are defined per Freescale MPC852TEC Rev. 4, Sections 12–15 and Figure 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPC852TCVR80A, MPC866PZQ66D offers USB but drops PCMCIA, while MPC855TVR100B delivers higher clock rate and cache but requires updated boot code for extended CPM register map - both retain FEC and CPM functional equivalence for Ethernet and serial protocol offload.

Availability

MPC852TCVR80A is available at Aetrix Electronics and suitable for DSL/Cable CPE, industrial Ethernet routers, VoIP terminals, and WiFi access point baseband designs requiring stable component supply across long-lifecycle embedded programs.

Supply support for MPC852TCVR80A 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) was a fabless designer of embedded processors and analog/mixed-signal ICs, specializing in automotive, industrial, and networking silicon.

The MPC852TCVR80A belongs to the PowerQUICC™ family - a line of integrated communications controllers designed to combine PowerPC processing, dedicated communications peripherals, and memory subsystems for cost-sensitive, real-time networking edge devices.

FAQ

What is the maximum supported core frequency for MPC852TCVR80A?

The MPC852TCVR80A supports a maximum core frequency of 80 MHz, but only in 2:1 bus mode with a 40-MHz external bus. It does not support 80 MHz in 1:1 mode. This is explicitly stated in Section 2 Features of the MPC852TEC Rev. 4 specification, which confirms "80/100 MHz core frequencies support 2:1 mode only." The MPC852TCVR80A datasheet defines this as a hard architectural constraint, not a recommendation.

Does MPC852TCVR80A support IEEE 802.3 100-Mbps Fast Ethernet?

No, the MPC852TCVR80A does not support 100-Mbps Fast Ethernet. Its integrated Fast Ethernet Controller (FEC) is specified for 10-Mbps operation only, as confirmed in Section 2 Features ("Ethernet/IEEE 802.3® standard optional on SCC3 and SCC4, supporting full 10-Mbps operation"). The term "Fast Ethernet" in the product name refers to the controller's ability to operate at line rate for 10 Mbps, not 100 Mbps. For 100-Mbps, an external PHY and MAC interface would be required.

What are the mandatory reset configuration requirements for MPC852TCVR80A?

The MPC852TCVR80A requires mandatory programming of SIUMCR[DBGC] and HRCW[DBGC] to binary X1 after reset, as documented in Table 6 and Section 10 of MPC852TEC Rev. 4. This configuration enables debug capabilities and must be performed in boot code before any other peripheral initialization. Failure to set these bits results in undefined debug behavior and may prevent JTAG access or proper exception vectoring.

Which pins on MPC852TCVR80A are 5-V tolerant, and what are the voltage limits?

The MPC852TCVR80A has 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. Per Table 5 and Section 9, these pins must not exceed VDDH + 2.5 V or 5.5 V absolute - whichever is lower - during power-up, power-down, or normal operation. Exceeding this violates absolute maximum ratings and risks permanent damage.

What thermal resistance value applies to MPC852TCVR80A on a standard 4-layer PCB?

For the MPC852TCVR80A in a 352-pin PBGA package mounted on a standard 4-layer board (2s2p construction), the junction-to-ambient thermal resistance (RθJA) is 32 °C/W under natural convection, as specified in Table 3 of MPC852TEC Rev. 4. This value assumes vias connecting thermal balls to the ground plane and is validated per JEDEC JESD51-6. Airflow at 200 ft/min reduces RθJA to 29 °C/W.