— 13 —
Mode
OFF
¤
OFF
(pin No. 78 of CPU)
Voltage
0
5
Mode
PRG
RF
REG
CAL
X
Z
Voltage (V)
4.0
3.3
2.4
1.7
0.9
0.1
except
Pin No.
Signal
Description
In / Out
P W - O N
l e v e l
55
P123
Display segment signal (SEG0d) / Key common singnal (KC2)
Out
Pulse
56
P124
Display segment signal (SEG0e ) / Key common singnal (KC1)
Out
Pulse
57
P125
Display segment signal (SEG0f) / Key common singnal ( KC0)
Out
Pulse
58
P126
Display segment signal (SEG0DP)
Out
Pulse
59
P127
Display segment signal (SEG0g)
Out
Low
60
RESET Reset signal (RESET)
In
High
61
P00
Timing pulse from printer (TP)
In
High
62
P01
TAX switch (TAX-SW ) / PAD condition signal (PAD2)
In
Low
63
P02
Power down signal (PWD)
In
Low
64
P03
Display common signal (DG1)
Out
Pulse
65
P04
Display common signal (DG2)
Out
Pulse
66
P05
Display common signal (DG3)
Out
Pulse
67
P06
Display common signal (DG4)
Out
Pulse
68
VDD
VDD terminal (VDD)
—
4.5 V
69
X1
Main system clock signal (5.00 MHz)
In
Pulse
70
X2
Main system clock signal (5.00 MHz)
In
Pulse
71
IC
Vss (GND)
—
GND
72
XT2
Sub system clock signal (32.768 kHz)
In
Pulse
73
XT1
Sub system clock signal (32.768 kHz)
In
Pulse
74
AVDD
Power for A/D converter (VDD)
—
5 V
75
AVREF0 Standard voltage for A/D converter (VCC)
—
5 V
76
P10
Low battery signal (LOW-BATT)
In
High
77
P11
Mode key condition signal (MODE)
In
2.4 V
78
P12
OFF signal of mode switch (OFF-MODE IN)
In
High
79
P13
PAD condition signal (PAD1)
In
Low
80
P14
Display segment signal (SEGTR ) / PAD condition signal (PAD3)
In / Out
Pulse
Note : The "PW-on level" was measured under the following conditions.
Mode switch is REG position.
5-3. Mode key switch status read
The CPU knows the mode swithc status by voltage level of 1 pin No. 77.
The voltage level is down by resistor. Each voltage is as shown bleow.
Voltage level (pin No. 77 of CPU)
20K
q
OFF
To pin No.77
To pin No.78
8.2K
q
3.9K
q
2K
q
820
q
PRG
RF
REG
CAL
X
Z
→
Содержание 200cR
Страница 25: ...23 8 Parts layout...
Страница 44: ...43 11 12 13 14 15 21 23 22 16 18 19 20 24 17 37 29 32 31 39 38 30 28 35 34 33 36 10 25 26 27...
Страница 49: ...48 DL 1320 1 9 10 11 12 4 3 2 6 8 7 5...
Страница 51: ...50 DL 2762 1 9 11 10 9 5 7 3 6 8 4 2...
Страница 59: ...58 DL 1320 1 9 10 11 12 4 3 2 6 8 7 5...
Страница 61: ...60 DL 2762 1 9 11 10 9 5 7 3 6 8 4 2...
Страница 63: ...62 DL 1832 8 7 2 3 4 5 9 10 11 12 1...
Страница 68: ...MA0901561A...