Brother HL-820, HL-1020, HL-1040 manual II-5

HL-1040

Fig. 2-5 shows the block diagram of the main PCB.

A S I C

Reset Circuit

Program + Font ROM

512 Kbytes

RAM

(2.0 Mbytes)

Option Serial I/O

(RS232C & RS422A)

EEPROM (128 8 bits)

Motor Driver

CPU Core
(MC68EC000)
BUS	INT

Oscillator (15.3MHz)

Address Decoder

DRAM Control

Timer

FIFO

DATA EXTENSION

CDCC Parallel I/O	To PC
Soft Support

EEPROM I/O

Engine Control I/O

To Panel Sensor PCB

Fig. 2-5

II-5