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c)
Pin Assignment
Pin No.
Symbol
QFP
DIP
18
1
XT1
19
2
XT2
20
3
Reset
21
4
X1
22
5
X2
23
6
RDY
24
7
ACK
25
8
S3
26
9
RP
27
10
RF
28
11
SLIN
29
12
RXD
30
13
S2
31
14
S1
32
15
ES
33
16
INT
35
17
STB
36
18
RXD
37
19
DP
Signal
IN
OUT
Connect to VDD or VSS.
Not use
System reset signal. If this signal is set to the Low level, the inside of the
V
LSI is initialized.
V
Oscillator terminals. 4.19 MHz
V
If receivable at data transfer time, this signal is set to the Low level.
V
If data read is completed at parallel data receive time, the Low pulse is
V
output.
Function selection S3.
V
RP Signal from the printer.
V
Paper feed signal. Effective only in the off-line mode.
V
On-line setting signal. When this signal is at the Low level, the on-line
mode is selected to enable data transfer. When this signal is at the High
V
level, the off-line mode is selected to disable data transfer.
Serial transfer. Serial data input pin.
V
Function selection S2 * 1
V
V
Function selection S1 * 1
V
V
Power-down command signal. If this signal is set to the Low level, control
V
is interrupted and oscillation stops, resulting in the power-down mode.
Power-down reset signal. If this signal is set to the Low level, the power-
V
down mode is reset.
Strobe pulse input
Negative logic
V
"Low"=8-bit data read
DIP type: Connect to 12 PIN
V
QFP type: Connect to 29 PIN
DP signal from the printer
V
Function
0.5%
6
CBM-909PC Series User'sManual
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