Brother HL-1040 - Manual (Page 22)

II-6
Fig. 2-6 shows the block diagram of the main PCB.
Reset Circuit
Program + Font ROM
4.0 Mbytes
RAM
(4.0 Mbytes)
Option RAM (SIMM)
(max. 32Mbytes)
Option Serial I/O
(RS232C & RS422A)
EEPROM (512 x 8 bits)
CPU Core
(MB86831)
A S I C
Oscillator (33.3MHz)
Address Decoder
DRAM Control
Timer
FIFO
CDCC Parallel I/O
Soft Support
EEPROM I/O
Engine Control I/O Motor Driver
To Panel Sensor PCB
BUS INT
To PC
USB I/O
To PC
Fig. 2-6
HL-1050