Roland MSQ-700 Service Notes page 18

MSQ-700
SEP., 1984
M5L8255
Pin Configuration (Top View)
40H163
PA 3 4*(T
PA2«*.(T
pai^{T
PAo^U
RD-*(T
CS-*Q[
(OV) GND (7
Ai-*{8
Ao-*E
PC7-**1®
PCe^E
PCs^Ql
PC««M.(i3
PCo^E
PCi-^Qs
PC24*(jg
pc3^tn
PBo-^-01
PBi
PBa-w-dO
S**-PA4
3U**PA5
D**pa
6
37)4*PA7
1*-WR
D*-reset
HWDo
H**Di
32]4*D2
1-04
29)4*05
H)4*D6
27]4*D7
ID VCC (5V)
H>»-pb7
14*pb6
HKpbs
22)4*PB4
H|4*PB3
Basic Operation
A0
RD WR cs
0 0 1 0
1 0 1
0
0 0 1 0
0 1
0 0
1 1 0 0
0 1 0
0
1 1 0 0
X X X
1
1 0 1 0
X 1 1
0
PORT A - DATA BUS
PORT B - DATA BUS
PORT C- DATA BUS
OUTPUT OPERATION
(WRITE)_
DATA BUS -» PORT A
DATA BUS ■» PORT B
DATA BUS - PORT C
DATA BUS-CONTROL
DISABLE FUNCTION
DATA BUS-* 3-STATE
ILLEGAL CONDITION
DATA BUS =► 3-STATE
CLEAR £T
CLOCK
[*E
DATA B
IT
INRJTS (
Pin Configuration
frt-... V bivDD
1 RIPPLE
J
CARRY OUT
|—I I OUT
blQc PUTS
Truth Table
DATA INPUT!
A I B I C ~
Don't Care
Do n
11
Care
Don 11 Care
Program Data
Program Data
Don1 t Care
Don't Care
Do n11 Care
OUTPUTS
DATA OUTPUTS
Qa 1 qb | Qc |
No change
No change
All Reset
Program Output
Program Output
No count_
No count_
Count up_
(Top View)
Don 11 care
0 ITC40H160P/161P Don't Care
*TC40H162P/163P Sync on rii isinq edge of CLOK
40H139
Pin Configuration
SELECT DATA OUTPUTS
ENABLE,—*-^ ^
VI i) 20 2A 2B zyo 2Y1 2 Y 2 *Y3
rafhnRferisimnoim
40H138
Pin Configuration
DATA OUTPUTS
VDD YO Y1 Y2 Y3 14 Y5 16
■ «a ■ m msj ■ re
SBSSai
A B C 02A02B 01 Y7 Vss
SELECT ENABLE OUTPUT
(Top View)
40H157
Pin Configuration
STROBE
v DD 0 4A 4B 4Y 3A 3B 3Y
Truth Table
ENABLE
1Q2A I Q2D
SELECT
B
&•
H
OUTPU rs
75 f~7T
H H
10 IA IB 1Y0 111 )Y2 IY3 VS8
ENARLFI-*-' '-v--—J
select data outputs
(Top View)
Truth Table
Do u't: care
INPUTS
HNABli<;| SELECT
0 A B
H *
L L L
L H
L
I, I. H
L H h
OUTPUTS
I 71 I 75
Don t care
Truth Table
I N F' U r 8
ITROBeI select! DATA
OUTPUTS
Hi 5 7 P j HJ58P
S 1A IB it 2A 2D 01 Vs
SELECT
(Top View)
X = D o n 1 t On re
18