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Symbol

Layout

3D View

Design view of Random Access Memory
A - Programming B - SAP-1 control
J

jacoban

A - Programming
B - SAP-1 control
1y
4
From MAR
J

javalos

From MAR
1y
2
Remove this when implementing into SAP-1
J

jacoban

Remove this when implementing into SAP-1
1y
5
Out 3
Out 1
Out 8
Out 7
Out 2
Out 5
Out 4
Out 6
Vcc
Vcc
SW1
S2
U2 (74LS189) RAM
U1 (74LS189) RAM
Vcc
Vcc
10kΩ
Resistance
10kΩ
R6
Resistance
350Ω
Bit 8
W bus (output)
10kΩ
Resistance
10kΩ
Bit 5
R3
Resistance
350Ω
Bit 2
10kΩ
Resistance
10kΩ
R8
Resistance
350Ω
10kΩ
Resistance
10kΩ
R1
Resistance
350Ω
R4
Resistance
350Ω
Bit 4
R7
Resistance
350Ω
Bit 1
10kΩ
Resistance
10kΩ
10kΩ
Resistance
10kΩ
R2
Resistance
350Ω
10kΩ
Resistance
10kΩ
Bit 7
10kΩ
Resistance
10kΩ
Circuit enable switch
Write enable (aka Program) switch or button
R5
Resistance
350Ω
10kΩ
Resistance
10kΩ
10kΩ
Resistance
10kΩ
Bit 6
10kΩ
Resistance
10kΩ
Bit 3
LED display
10kΩ
Resistance
10kΩ
10kΩ
Resistance
10kΩ
Address Bus Switch
Test enable switch
Name
Pin #
Type
Section
Pin Group
Orientation
Order
Sub-symbol
CE (INVERTED)
Unspecified
Out 1
Unspecified
Out 2
Unspecified
Out 3
Unspecified
Out 4
Unspecified
Out 5
Unspecified
Out 6
Unspecified
Out 7
Unspecified
Out 8
Unspecified

Random Access Memory

Random Access Memory thumbnail