Main Pcb Block Diagram - Brother HL-2030 Service Manual

CHAPTER 3 THEORY OF OPERATION
1.2

Main PCB Block Diagram

Fig. 3-2 shows the block diagram of the main PCB. (HL-2030/2040/2070N)
Reset Circuit
Program + Font ROM
HL-2030/2040: 1MB
HL-2070N: 8MB
Network Program
(HL-2070N only)
RAM
HL-2030/2040: 8MB
HL-2070N: 16MB
EEPROM
HL-2030/2040: 512 x 8 bit
HL-2070N: 4096 x 8 bit
To PC
or Hub
CPU Core (SPARClite)
HL-2030/2040: 96.0MHz
HL-2070N: 133.0MHz
BUS
Network Controller
(HL-2070N only)
Oscillator 25MHz
(HL-2070N only)
A S I C
Oscillator
HL-2030/2040: 48.0MHz
HL-2070N: 66.6MHz
INT
Address Decoder
DRAM Control
CDCC Parallel I/O
(External Gate Array)
Oscillator 12MHz
Soft Support
EEPROM I/O
Engine Control I/O
Fig. 3-2
3-2
Timer
FIFO
To PC
To PC
USB I/O
Confidential