Citizen CBM-909PC SERIES User Manual page 20

*4 After this, paper feed is enabled via the PF pin.
*5 The ACK signal is output by 1 pulse after resetting the LSI.
7. Serial interface timing chart
*1
VCC
RESET
SLIM
DTR
RXD
SAMPLING
DATA
PF
*1 It is necessary to secure an oscillation frequency stabilization time.
*2 Time required for the LSI to make the SLIN pin sensible after resetting the system.
*3 The number of start bits should be 1 bit.
*4 The number of stop bits should be 1 bit or more.
*5 After this, paper feed is enabled via the PF pin.
*6 The DTR signal may rise regardless of the RXD signal due to printer control. When transferring the data,
therefore, it is necessary to set the RXD signal to the Low level within 200 s after checking the DTR signal,
and
*2
*6
D0 D1 D2 D3 D4 D5 D6 D7
*3
then, transfer the data.
*4
16
CBM-909PC Series User'sManual
IN
*5
IN
50us (Max.)
OUT
IN
IN
30ms (Min.)