Sharp AL-1611 Service Manual page 77

2. MCU
A. BLOCK DIAGRAM (MCU)
AL-1622
only
B. CPU (HD6412351IF)
(1) pin/signal table
Pin No. Pin name Signal name
1 /CS1 /CS1
2 /CS0 /CS0
3 VSS
4 VSS
5 VCC
6 A0
7 A1
8 A2
9 A3
10 VSS
11 A4
12 A5
13 A6
14 A7
15 A8
16 A9
17 A10 A10
18 A11 A11
19 VSS
20 A12 A12
21 A13 A13
(Pin descriptions) IN: Input pin OUT: Output pin BIDIR: Bi-directional pin ODN: Open drain output pin TR1: 3-state output pin POW: Power pin
I/O
OUT Area 1 chip select
OUT Area 0 chip select
POW Ground pin
POW Ground pin
POW Power pin
A0 OUT Address bus 0
A1 OUT Address bus 1
A2 OUT Address bus 2
A3 OUT Address bus 3
POW Ground pin
A4 OUT Address bus 4
A5 OUT Address bus 5
A6 OUT Address bus 6
A7 OUT Address bus 7
A8 OUT Address bus 8
A9 OUT Address bus 9
OUT Address bus 10
OUT Address bus 11
POW Ground pin
OUT Address bus 12
OUT Address bus 13
AL-1611/AL-1622 ELECTRICAL SECTION
Function Purpose
SRAM chip select
Flash ROM chip select
System bus
System bus
System bus
System bus
System bus
System bus
System bus
System bus
System bus
System bus
System bus
System bus
System bus
System bus
13 – 2
Descriptions
L: Select
L: Select