Ic Data - Casio QT-2100 Service Manual

11. IC DATA

1. COM20019ILJP (IC14)
25 24
nWR/DIR 26
nRD/nDS 27
VDD
28
A0/nMUX
1
A1 2
A2/ALE 3
4
AD0
6
5
A0/nMUX
A1
A2/ALE
AD0-AD2,
D3-D7
nINTR
nRESET
nRD/nWR
nWR/DIR
nCS
23 22 21 20 19
nPULSE1
18
17
XTAL2
XTAL1
16
15 VDD
14 VSS
N/C
13
12
D7
7 8 9 10 11
ADDRESS
DECORDING
CIRCUITRY
STATUS/
COMMAND
REGISTER
SEQUENCER
RESET
LOGIC
BUS
ARBITRATION
CIRCUITRY
RECONFIGURATION
2K 8
RAM
MICRO-
AND
WORKING
REGISTERS
TIMER
— 62 —
ADDITIONAL
REGISTERS
nPULSE1
nPULSE2
TX/RX
LOGIC nTXEN
RXIN
XTAL1
OSCILLATOR
XTAL2
NODE ID
LOGIC