Yamaha FB-01 Service Manual page 21

■ NEW LSI DATA TABLE
MPD70008AC-6 (XA278001)
PIN
NO.
1 All
2 A12
3 A13
A14
A15
0
D4
8 D3
9 D5
10 D6
11 +5
12 D2
13 D7
14 DO
15 D1
16 INT
17 NMI
18
NAME I/O
FUNCTION
[•j
LtJ
Address bus
Clock
M
M
M
S
[tj
Data bus
DC Supply (+5V)
Data bus
Interrupt Request
Non Maskable Interrupt
Halt State
Memory Request
Input/Output Request
NAME 1/
40 A10 O
39 A9
38 A8
37 A7
36 A6
35 A5
34 A4
33 A3
32 A2
31 A1
30 AO
29 GND
28 RFSH
27 Ml
26 RESET I
25 BUSRQ
24 WAIT
23 BUSAK
22 WR
21 RD
■
FUNCTION
Address bus
DC Supply (OV)
Refresh
Machine Cycle one
Reset
Bus Request
Wait
Bus Acknowledge
Write control
Read control
YM3012DAC (2-Channel serial input Floating D/A converter) iT301200
PIN
NO.
1
2
3
NAME I/O
ICL
8
Ia.gnd
FUNCTION
PIN
NO.
NAME
I/O FUNCTION
DC supply (+5V) 16 A.GND
I
Analog ground
Timing clock
15 RB
0
Bias-R
Digital Ground 14
BC 1
Bias compensation
Serial data input
13
MP
1
| Middle point 1/2 VDD Bias
Sample and hold (ch2) 12 A.OUT 0 Analog output to Buffer AMP
Sample and hold (chi)
11
COM
1
Chi ch2 analog SW common input
Initial clear 10 CH2 0 Sample and hold analog SW output
Analog Ground
9
CHI 0
(ch2)
Sample and hold analog SW output
(chi)