Sam4s ER-390 Series Service Manual page 32
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Also See for ER-390 Series:
- Service manual (100 pages) ,
- Operation and program manual (206 pages)
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6 Reference Information
6-1 Semiconductor Base Diagram
6-1-2 Memory
6-1-3 Logic ICs
V CC
B4
A4
Y4
B3
A3
14
13
12
11
10
9
1
2
3
4
5
6
A1
B1
Y1
A2
B2
Y2
Figure 6-4 74HCT08
LOGIC DIAGRAM
1
A0
ADDRESS
2
A1
INPUTS
3
A2
6
CS1
CHIP–
4
SELECT
CS2
INPUTS
5
CS3
FUNCTION TABLE
2
A1
3
A2
4
A3
5
A4
Data
Inputs
6
A5
7
A6
8
A7
9
A8
1
Output
OE1
Enables
OE2
19
6-4
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Figure 6-3 EPROM M27C4001 Specification
FUNCTION TABLE
Y3
8
Inputs
Output
A
B
Y
L
L
L
L
H
L
H
L
L
H
H
H
7
GND
15
Y0
14
Y1
13
Y2
12
ACTIVE–LOW
Y3
11
OUTPUTS
Y4
10
Y5
9
Y6
7
Y7
PIN 16 = V CC
PIN 8 = GND
Figure 6-6 74HC138
18
Y1
17
Y2
16
Y3
15
Y4
Noninverting
Outputs
14
Y5
13
Y6
12
Y7
11
Y8
PIN 20 = V
CC
PIN 10 = GND
Figure 6-7 74HC541
V CC
A6
Y6
A5
Y5
A4
Y4
14
13
12
11
10
9
8
1
2
3
4
5
6
7
A1
Y1
A2
Y2
A3
Y3
GND
Figure 6-5 74HC14
FUNCTION TABLE
Inputs
CS1 CS2 CS3 A2 A1 A0 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
X
X
H
X
X
X
H
H
H
X
H
X
X
X
X
H
H
H
L
X
X
X
X
X
H
H
H
H
L
L
L
L
L
L
H
H
H
L
L
L
L
H
H
L
H
H
L
L
L
H
L
H
H
L
H
L
L
L
H
H
H
H
H
H
L
L
H
L
L
H
H
H
H
L
L
H
L
H
H
H
H
H
L
L
H
H
L
H
H
H
H
L
L
H
H
H
H
H
H
H = high level (steady state); L = low level (steady state); X = don't care
FUNCTION TABLE
Inputs
OE1
OE2
A
L
L
L
L
L
H
H
X
X
X
H
X
X = Don't Care
Z = High Impedance
FUNCTION TABLE
Inputs
Outputs
A
Y
L
H
H
L
Outputs
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
L
H
H
H
H
H
L
H
H
H
H
H
L
H
H
H
H
H
L
Output Y
L
H
Z
Z
SAM4S ER-390 SERIES
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