NXP Semiconductors MPC823VR75B2T

Overview

MPC823VR75B2T from Freescale Semiconductor is a dual-processor embedded microprocessor integrating a 75 MHz PowerPC core and a dedicated communication processor module (CPM), with on-chip video/LCD controller, USB 1.1 host/slave interface, PCMCIA-ATA v2.1 controller, and 256-pin PBGA package. It delivers 99 MIPS (Dhrystone 2.1), supports 4K–8M memory page sizes, and targets low-power portable imaging and communications devices.

For engineers reviewing the MPC823VR75B2T datasheet, MPC823VR75B2T pinout, MPC823VR75B2T application, or MPC823VR75B2T equivalent, key selection criteria include its dual-processor architecture, 75 MHz operation, 3.3V I/O with 5V TTL-compatible GPIO, integrated LCD/video timing control, and support for Ethernet/HDLC/ISDN/IrDA protocols via CPM serial channels.

Technical Context

The MPC823VR75B2T implements a static 32-bit PowerPC core with 2 KB instruction cache and 1 KB data cache, MMU with 8-entry fully associative TLBs, and support for 4K/16K/512K/8M page sizes. Its CPM executes imaging and communication tasks in parallel using a 32-bit scalar RISC microcontroller with 16×16 MAC hardware and 8 KB dual-port RAM.

System integration includes a memory controller supporting eight banks with glueless interfaces to DRAM, SRAM, Flash, and SDRAM; a system interface unit with dynamic bus sizing (8/16/32-bit), JTAG debug port, real-time clock, and six power management modes (Normal High/Low, Doze, Sleep, Deep Sleep, Power-Down); and a shared video/LCD controller capable of NTSC/PAL encoding or TFT/STN panel driving.

Key Specifications

Pinout & Package

256-ball plastic ball grid array (PBGA) package, 23 mm × 23 mm body size, 1.27 mm ball pitch, JEDEC MO-205AC compliant. Pinout defined per MPC823 Reference Manual (MPC823RM/D) and Electrical Specifications (MPC823ELE/D).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar embedded microprocessor applications.

Compared with MPC823VR75B2T, MPC8245VR75B2T offers greater peripheral density but demands layout changes, while MPC8313EVRAGDB delivers higher CPU performance and security features at the cost of integrated display support-neither is pin-compatible, and both require full firmware and hardware revalidation.

Availability

MPC823VR75B2T is available at Aetrix Electronics and suitable for handheld imaging devices, portable ISDN terminals, mobile point-of-sale systems, and industrial HMI panels requiring stable component supply across long-lifecycle embedded programs.

Supply support for MPC823VR75B2T 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 leading designer of embedded processors, analog, and mixed-signal ICs for automotive, industrial, and networking markets.

The MPC823VR75B2T belongs to Freescale's PowerQUICC family of integrated communications processors, designed specifically for low-power, portable applications requiring concurrent signal processing, rich I/O, and graphical user interfaces.

FAQ

What is the maximum operating frequency of the MPC823VR75B2T?

The MPC823VR75B2T is rated for a maximum core clock frequency of 75 MHz, as confirmed in the MPC823 Electrical Specifications document (MPC823ELE/D). This frequency applies to both the PowerPC core and the communication processor module under specified thermal conditions (Tj ≤ +95°C). The device uses an external 75 MHz clock input fed into an on-chip PLL to generate internal bus clocks, and EBDF must be set to divide-by-2 for reliable operation above 50 MHz.

Does the MPC823VR75B2T support USB device mode?

Yes, the MPC823VR75B2T supports both USB host and slave (device) modes at full speed (12 Mbps) via its dedicated USB channel, as documented in the MPC823 Reference Manual (MPC823RM/D). It implements four USB endpoints and complies with USB 1.1 specifications. However, it does not support USB 2.0 or high-speed operation, and external transceivers are required for physical layer compliance.

What memory types does the MPC823VR75B2T memory controller support without external logic?

The MPC823VR75B2T memory controller provides glueless interfaces to DRAM, SRAM, EPROM, Flash EPROM, SDRAM, and EDO memory, as stated in the Technical Summary and Memory Controller section of MPC823RM/D. It supports eight independently configurable banks, variable block sizes (32K–256M), and up to 20 programmable wait states per bank-enabling direct connection to common memory components without address latches or bus buffers.

Can the MPC823VR75B2T drive both video encoders and LCD panels simultaneously?

No, the MPC823VR75B2T's video/LCD controller is a shared resource with a single dual-port memory interface; only one controller (video or LCD) can be active at a time, as explicitly noted in the Video/LCD Controller section of MPC823RM/D. While both functions are integrated, time-multiplexing is required-e.g., video output during capture, LCD display during UI interaction-with software-managed context switching.

What debug capabilities does the MPC823VR75B2T provide for firmware development?

The MPC823VR75B2T includes IEEE 1149.1 JTAG test access port, four hardware breakpoints, five watchpoint sources (eight comparators), and program flow tracking features including instruction/data show cycles and exception traps, as detailed in the System Debug Support section of MPC823RM/D. These enable non-intrusive real-time debugging without performance penalty, supporting complex firmware validation for both PowerPC core and CPM code.