Intermec EasyCoder 501 - A;D and I;O Circuits

Intermec EasyCoder 501 – Service Manual Ed. 7
134
Chapter 17 CPU Board
17.6:2 A/D and I/O Circuits
C12—C31
C9
65432
RN5
78910
VER3 VER2 VER1 VER0 JUM4 JUM3 JUM2 JUM1
28 27 26 25 24 23 22 21 20 19
PB7 PB6 PB5 PB4 PB3
NC
PB2 PB1 PB0 PC3 PC2
18
WR
A19' A20' A21' A22' A23'
765432
RN91
+5V
8 9 10
A18' A17' A16'
VCC
30
D7
31
D6
32
D5
33
D4
34
NC
35
D3
36
D2
37
D1
38
D0
39
RESET
2345678910
AD0-A15,A1-A20
AD–P24
AD–LSS
AD–VIN
AD–TEMP
AD–RES
C5
R18
R16
R15
R14
R13
RD
+5V
CSAD
WR
ADREADY
AD0 AD1 AD2 AD3
25 24 23 22 21
26
27
28
1
3
4
5 6 7
8
9
C6
C7
C8
GND
11 10
C4
12
GND13
14
15
GND
AD717
AD618
19 20
AD5 AD4
R10
GND
10 9 8 7 6 5
RN6
4 32
RESET
39RESET
D0
38AD0
D1
37AD1
D2
36AD2
D3
35AD3
NC
34
D4
33AD4
D5
32AD5
D6
31AD6
D7
30AD7
VCC
+5V
IC22
8255AM
PA7 PA6 PA5 PA4 PA3 PA2 PA1 PA0
WR NC
40 41 42 43 44
1 2 3 4 5
HEADLIFT
RIB–END
ADREADY
VIN–OK
CUT–IN
LABEL
RS–OK
WR
LTS
RD
6
RD
CS
CS8255A7
GND
GND
A1
A29
A0
A110
PC7
11
NC
12
PC6
13
PC5
14
PC4
15
PC0
16
PC1
17
CGDATA
CGSTROB
CGLATCH
PPWREN
CGCLK
CGENABLE
CGSTART
OR–ON
+5V
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
RESET
RN3
WR
IN2 IN1
ERROR
DATAIN
RS–IDENT DI–IDENT
NC WR
PA1 PA2 PA3 PA4 PA5 PA6 PA7
8255AM
IC23
PB0 PB1 PB2
NC
PB3 PB4 PB5 PB6 PB7
19 20 21 22 23 24 25 26 27 28
OUT1 OUT2 OUT3 OUT4
18
PC3 PC2
PC1
PC0
PC4
PC5
PC6
NC
PC7
A0
A1
GND
CS
PA0
RD
RD
V24-EN
EN-DOUBLE
EN-500
BEEPEN
CUT–OUT
5 4 3 2 1
44 43 42 41 40
17
16
15
14
13
12
11
10 A1
9A2
GND
7 CS8255B
6
EN–ENG1
EN–ENG2
LIFT–HEAD
RD
AD8 AD6 AD4 AD2 AD0
AD12 AD10
RN7
AD14
AD11
AD1 AD3 AD5 AD7 AD9
AD15 AD13
RN8
98765432 10
1
+5V
98765432
1
+5V
10
1
+5V
1
+5V
1
+5V
RTC-72421
7A4
6A3
5A2
4A1
3+5V
15/RESET
2CSRTC
10WR
8RD
IC20
18 VEE
VBB
1
STDP
14 AD4
D0
13 AD5
D1
12 AD6
D2
11 AD7
D3A3
A2
A1
A0
ALE
CS1
CS0
WR
RD
DB0 DB1 DB2 DB3
NC
INTR
WR
CS
ADC0848M
NC
VCC
RD IC21
CH1
CH2 CH3 CH4 CH5
NC
CH7 CH6
CH8
AGND
VREF
NC
GND
DB7
DB6
DB5 DB4
GND
+5V
GND
+5V
GND
VEE
C34—C39
C32—C33
+5V
AD-CHARGE
GND GND
+5V
GND
R27
R28
R30
R32
R25
R29
R31
R33
GAL-IDENT
R23
1
2
Q4
3
GND
R26
R35
+5V
R24
+5V
P10