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Data Controller

251

Data Controller

The data controller (DC) consists of the following elements:

• 68EC030 microprocessor

• Two flash SIMM sockets, for up to 30MB of program memory

• Two DRAM SIMM sockets, for up to 32MB of data memory

• 8K x 8 Non-Volatile Battery-Backed static RAM (NVRAM) for storage of

configuration and system statistical data

• VX ASIC (Application-Specific Integrated Circuit)

• Host I/O Drivers/Termination

68EC030 Microprocessor

A Motorola 68EC030 microprocessor serves as the processor of the DC unit.

This processor runs at 25 MHz on all models except the P5X05B, P5X10,

P5214, P5X15, and P5XKA.

On P5X05B, P5X10, P5214, P5X15, P5XKA printers the 68EC030 processor

runs at 40 MHz and the controller board on these models is called the “CMX

040.” The CMX 040 controller is backwards compatible with any P5000 series

printer, but must be used in P5X05B, P5X10, P5214, P5X15, and P5XKA

printers.

Although this chapter refers to the DC microprocessor as simply the “030,”

remember that two different clock speeds are available.

Flash Memory

The DC stores program and emulation code in flash memory. Flash memory

is erasable, non-volatile, and significantly faster than a disk drive.

The DC uses AMD 5.0V-only flash memory, which does not require higher

programming and erasing voltages on the board (it has an internal charge

pump to make these voltages itself). This memory supports at least 100,000

write/erase cycles. The flash memory is 32 bits wide. It is byte, word, and

double word readable, but is always written as double words.

Two 80-pin SIMM sockets are provided for flash memory. Up to 30MB of flash

(total), organized as up to four banks, may be installed in the two sockets on

the controller board. The boot code for the 68EC030 processor must reside in

bank 0.

Programs stored in flash memory are changed through the parallel or serial

port.

DRAM

System DRAM is used for program variables, image buffers, and input

buffers. All DRAM supports page mode operation and is addressable by

individual byte.

Two standard 72-pin DRAM SIMMs are used for expansion memory. The DC,

through the VX ASIC, may address up to 32MB of DRAM in four banks.

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Printronix P5000 Manual de Instruções Página 251