Intermec EasyCoder 301 – Service Manual Ed. 3
54
Chapter 11 CPU Board
11.8 Schematics,
cont'd.
CPU Board 1-301700-04; I/O Circuits
_WR_PERIPH_0
PH_POWER
6
74HCT32
≥
1
U27
1
2
3
74HCT32
≥
1
U20
12
13
11
74HCT32
≥
1
U20
9
10
8
74HCT32
≥
1
U20
4
5
6
74HCT32
≥
1
U20
1
2
3
74HCT02
≥
1
U16
2
3
1
74HCT02
≥
1
U16
5
6
4
4
74HCT32
≥
1
U27
12
13
11
74HCT02
≥
1
U16
8
9
10
74HCT32
≥
1
_WR_PERIPH_1
U27
9
10
7
8
74HCT32
U19
74HCT240
≥
1
_RD_PERIPH_0
U27
4
5
1
2
EN
18
0
6
6
4
16
1
6
14
2
8
12
3
U19
74HCT240
19
11
EN
9
4
13
7
5
15
5
6
17
3
7
U9
74HCT240
1
2
EN
18
8
4
16
9
6
14
10
8
12
11
U9
74HCT240
19
11
EN
9
12
13
7
13
15
5
14
17
3
15
U18
74HCT240
1
2
EN
18
4
16
6
14
8
12
U18
74HCT240
19
11
EN
9
13
7
15
5
17
3
PH_BEO
_PC_IORD
_PC_OE
_PC_IOWR
_PIC_RESET
_FSYNC
_PC_REG_A
_PC_RST_A
_PC_CE1_A
_PC_CE2_A
_PC_REG_B
_PC_RST_B
_PC_CE1_B
_PC_CE2_B
_WAIT
_PC_WE
_LABEL_TAKEN_TX
_LABEL_DRIVE_0
_LABEL_DRIVE_1
_LABEL_DRIVE_2
_LABEL_DRIVE_3
_LABEL_DRIVE_4
PC_REG_A
PC_CE1_A
PC_CE2_A
PC_CE1_B
PV_CE2_B
MEM_A
_MEM
_IO
MEM_B
PC_REG_B
_PC_MEMEN_A
_PC_MEMEN_B
PC_BYTE_A
PC_BYTE_B
_PIC_RESET
_FSYNC_EN
1
2
3
0
1
2
3
1
2
3
14
13
0
15
74HCT02
≥
1
U11
VCC
11
12
13
74HCT04
≥
1
U25
3
4
9
13
5
74HCT02
≥
1
U11
8
9
10
74HCT02
≥
1
U11
2
3
1
74HCT04
≥
1
U25
6
74HCT02
≥
1
U11
5
6
4
5
4
5
4
74HCT04
≥
1
U25
8
74HCT04
≥
1
U25
12
_WRU
_RD
_WRL
A(24:1)
_RESET
_LABEL_TAKEN_RX
_RIBBON_PRESENT
_LABEL_THROUGH
CUT_DONE
COMP_RESISTANCE
COMP_THERMISTOR
COMP_40V
COMP_HEATSINK
_PC_CD1_A
_PC_CD2_A
PC_BVD1_A
PC_WP_A
_PC_CD1_B
_PC_CD2_B
PCBVD1_B
PC-WP_B
FSYNC
_CS(7:0)
RESET
_PC_WAIT_A
_PC_WAIT_B
D(15:0)
U10
74HCT259
5
4
1
0
2
0
7
G8
8M
Z9
Z10
6
7
9
10
11
12
9,0D
10,0R
9,1D
10,1R
9,2D
10,2R
9,3D
10,3R
9,4D
10,4R
9,5D
10,5R
9,6D
10,6R
9,7D
10,7R
2
3
14
13
15
U26
74HCT259
5
4
0
2
0
7
G8
8M
Z9
Z10
6
7
9
10
11
12
9,0D
10,0R
9,1D
10,1R
9,2D
10,2R
9,3D
10,3R
9,4D
10,4R
9,5D
10,5R
9,6D
10,6R
9,7D
10,7R