Sharp CD-C250X BK Service Manual page 20

Pin No. Port Name
11 P57
P56
15.16
17-18
19
20 P46
25
26
27 RESET
61-72 (65*)
73 I v c c
74 VREF
75 AVSS
76-79
80
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
T e r m i n a l N a m e hpUt/OUtput
Input
In/Output
ADT In/Output
TOUT
In/Output
In/Output
In/Output
In/Output
SCLK In/Output
In/Output
In/Output
0 In/Output
Input
RESET
output
I vcc
VREF input
AVSS In/Output
output
Input
Supply voltage of 0-VL2 to LCD
CMOS input level CMOS 3 state output. (8 bit I/O port.)
CMOS input level CMOS 3 state output. (8 bit I/O port.)
CMOS input level CMOS 3 state output. (8 bit I/O port.)
CMOS input level CMOS 3 state output. (8 bit I/O port.)
CMOS inout level CMOS 3 state outout. (8 bit I/O port.)
CMOS input level CMOS 3 state output. (7 bit l/O port.)
CMOS input level CMOS 3 state output. (7 bit I/O port.)
CMOS input level CMOS 3 state output. (7 bit I/O port.)
CMOS input level CMOS 3 state output. (7 bit II0 port.)
CMOS input level (1 bit input port.)
The orocessor is reset. if held at " L" for more than 2~s.
CMOS inout level. (4 bit inout
LCD segment output pin.
Input pin for the A-D converter reference voltage.
GND input for A-D converter. Connect to VSS
LCD common output pin.
Supply voltage of VL3 to LCD.
F u n c t i o n
I