Casio CE-300 Service Manual page 8

www.freeservicemanuals.info
Pin No. Signal
56 HD.E
57 HD.F
58 HD.G
59 HD.H
60 RESET
61 DP
62 RP
63 OFF
64 PWD
65 RB0
66 RB1
67 RB2
68 VDD
69 X2
70 X1
71 IC
72 XT2
73 XT1
74 AVDD
75 AVREF0 VCC
76 BAT
77 VPP.S
78 FB0
79 FB1
80 FB2
Description
Head drive signal of printer (HD.E)
Head drive signal of printer (HD.F)
Head drive signal of printer (HD.G)
Head drive signal of printer (HD.H)
Reset signal (RESET)
Dot pulse form printer (DP)
Reset pulse from printer (RP)
Mode key status (OFF)
Power down signal (PWD)
Address signal for RAM (Bank 0)
Address signal for RAM (Bank 1)
Address signal for RAM (Bank 2)
VDD
System clock (5 MHz)
System clock (5 MHz)
GND
Sub system clock (32.768 KHz)
Sub system clock (32.768 KHz)
VDD
Low battery signal
VPP detection signal (VPP.S)
Address signal of Fiscal ROM bank 0
Address signal of Fiscal ROM bank 1
Address signal of Fiscal ROM bank 2
Digitized in Heiloo, Holland.
I n / O u t
Out
Out
Out
Out
In
In
In
Out
In
Out
Out
Out
—
In
In
—
In
In
—
—
In
In
Out
Out
Out
— 6 —
Status of Status of
Power On Power OFF
Low Low
Low Low
Low Low
Low Low
High High
Low High
High High
High Low
Low High
High High
High High
High High
5 V 5 V
Pulse High
Pulse High
GND GND
Pulse Pulse
Pulse Pulse
5 V 5 V
GND GND
High High
Low Low
High High
High High
High High
3/22/15