Sony PCM-1630 Operation And Maintenance Manual page 66

uPD8243C (NEC)
N·MOS 1/0 PORT EXPANDER
-TOP VIEW-
CONTROL AND PORT ADDRESSING
P23 P22 P21 P20
PORT CONTROL
0 0 0 0
4
0
0 0 1 5
READ
0 0 1 0 6
0 0 1 1 7
0
1 0 0 4
0
1
0
1 5
WRITE
0 1 1 0 6
0 1
1
1
7
1 0
0 0
4
1 0 0 I
5
OR
1 0 1 0
6
1 0
1 I 7
1 1 0
0 4
1 1 0 1 5
AND
I I
1
0
6
1 1 1
I
7
PROG
~
PROGRAM PULSE INPUT
E5,
CHIP SELECT INPUT
P20....,P23; 1/0 PORT 2 (FOR CPUl
P40-P43; 1/0 PORT 4
P50"'P53; 1/0 PORT5
P60-P63; 1/0 PORT6
P70-P73; I/ 0 PORT 7
PORT4
PORT5
PORT6
PORT7
~PD8749HD
I NEC)
N-MOS 8-BIT MICROCOMPUTER
-TOP VIEW-
TEST 0
XTAL 1
,.
XTAL 2
,.
RESET
,.
ss
IN
iNT
,.
EA
,.
Ri)
OUT
PSEN ouT
WR
OUT
ALE OUT
090
081
uo
082 1/0
083
084
110
095
110
086 l/0
087 110
{~PROGRAM
SUPPLY
~~::~y ~t5V
~GND
RESIDENT
EPROM
A-20
TEST 1 IN
P27
1'0
1'0
P25 1'0
P24 110
P17
110
P16
P15
110
P14
1'0
P13
P12 110
P11
110
P10 110
P10- P17
P20-P27
080-087
INT
Ro
P23
WR
ALE
P22
PSEN
Ss
P21
110
EA
PROG
P20 1/0
XTAL 1,2
~ ~
~
~ ~
110 PORT 1
J/0 PORT 2
DATA BUS
INTERRUPT
READ
WRITE
ADDRESS LATCH ENABLE
PROGRAM STORE ENABLE
SINGLE STEP
EXTERNAL ACCESS
PROGRAM PULSE
CRYSTAL
~ ~
0
~ z
e
~
~
~
~ ~
tl ~
::;
• w
=
~
~ al
ze
~
w.
Q!!!:
".
~ ~
= ~
WRITE
STROBE
READ
STROBE
SINGLE
STEP
PROGRAM
t.IEMORY
ENABLE
ADORESS
LATCH
STROBE'
CYCLE CLOCK
)
OSCILLATOR
X TAL.
CPU
MEMORY
SEPARATE
FROM
EXPANDER
STROBE
INITIALIZE
INTERRUPT