A8351601 Datasheet, PDF (26/44 Pages) AMIC Technology – Bar Code Reader

Serial Port Mode 1
A8351601 Series
TIMER1
OVERFLOW
TIMER2
OVERFLOW
A8351601 INTERNAL BUS
TB8
WRITE
÷2
TO
SMOD
=0
SMOD
=1
SBUF
D ^SQ
CL
SBUF
TXD
ZERO DETECTOR
"0"
TCLK
"0"
RCLK
"1"
÷ 16
"1"
SAMPLE
1-TO-0
TRANSITION
DETECTOR
START
SHIFT _DATA
TX CONTORL
RX CLOCK _TI
SEND
SERIAL
PORT
÷ 16
INTERRUPT
RX CLOCK ^RI
LOAD
RX CONTORL
START
SBUF
SHIFT
1FFH
RXD
BIT
DETECTOR
LOAD
SBUF
INPUT SHIFT REG.
(9SBITS)
SHIFT
READ
SBUF
SBUF
A8351601 INTERNAL BUS
TX CLOCK
WRITE TO SBUF
SEND
DATA
SHIFT
TXD
TI
S1P1
START
BIT
D0
D1
D2
D3
D4
D5
D6
D7
RX
CLOCK
÷ 16 RESET
RXD
START
BIT ^D0
D1
D2
D3
D4
D5
D6
RECEIVE _{BIT DETECTOR SAMPLE TIMES}
SHIFT
RI
Figure 10. Serial Port Mode 1
STOP BIT
D7 STOP BIT
TRANSMIT
(July, 2002, Version 1.0)
25
AMIC Technology, Inc.