Memory Copy Pcb - Kyocera KM-4230 Service Manual

2A3/4

2-3-4 Memory copy PCB

Clock frequency
24.39 MHz
Address bus
DRAMs
U13, 14, 15,
18, 19, 20
Address bus
Sort
memory
Figure 2-3-4 Memory copy PCB 1 block diagram
2-3-6
ASIC
U16
Data bus
Address bus
Data bus
CPU
U17
SRAM
U4,11
EPROM
U1
CODEC
U26
CODEC
U25
Data bus
Clock frequency
31.8 MHz
Clock frequency
3.6864 MHz
Clock frequency
39.86 MHz
FF