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• IC701 Display control, LED drive
Pin No.
Pin Name
1 to 3
—
4
AVss
5, 6
—
7
AVREF1
8
RXD
9
TXD
10
CTS
11
RTS
12
SDATA
13
SCK
14
CS
15
RST-OUT
16 to 26
—
27
LED1
28 to 31
LED2 to LED5
32
—
33
Vss
34 to 51
—
52
—
53 to 58
—
59
P-OFF
60
RESET
61
BUS-IN
62
BUS-OUT
63, 64
EN-IN
65 to 67
GND
68
V
DD
69
X2
70
X1
71
GND
72
—
73
GND
74
AV
DD
75
AVREF0
76 to 78
KEY1 to KEY3
79, 80
—
I/O
—
Not used in this unit (connected to ground)
—
Ground pin (A/D converter)
—
Not used in this unit (connected to ground)
—
Reference voltage input to D/A converter (+5V)
I
UART data input from system controller (IC201)
O
UART data output to system controller (IC201)
I
UART data transmission request signal input from system controller (IC201)
O
UART data transmission request signal output to system controller (IC201)
O
Serial data output to Fluorescent tube driver (IC702)
O
Serial clock output to Fluorescent tube driver (IC702)
O
Chip select signal output to Fluorescent tube driver (IC702)
O
Reset signal output to Fluorescent tube driver (IC702)
—
Not used in this unit (connected to ground)
I
Not used in this unit (Opened)
I
LED drive "L": Active
—
Not used in this unit (connected to ground)
—
Ground pin
—
Not used in this unit (connected to ground)
Attenuate ON/OFF output
O
"L": –6 dB attenute
—
Not used in this unit (connected to ground)
O
Forced reset output to system controller (IC201)
I
Reset signal output "L": Active
I
AU BUS signal input
O
AU BUS signal output
I
Encoder input
—
Ground pin
—
Power supply pin (+5V)
I
Main clock (5 MHz)
O
—
Ground pin
—
Not used in this unit (Opened)
—
Ground pin
—
Power supply pin (+5V) (A/D converter)
—
Reference voltage input to A/D converter (+5V)
I
Key input
—
Not used in this unit (connected to ground)
— 59 —
Function
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