90
3706C–MICRO–2/11
AT89LP3240/6440
Figure 16-1. Serial Port Mode 0
INTERNAL BUS
f
osc
INTERNAL BUS
TXD (SHIFT CLOCK)
RXD (DATA OUT)
TXD (SHIFT CLOCK)
RXD (DATA IN)
WRITE TO SBUF
SEND
SHIFT
TI
WRITE TO SCON (CLEAR RI)
SHIFT
RECEIVE
RI
“1“
÷2
TB8
0
1
TIMER 1
OVERFLOW
÷2
SMOD1
0
1
SM2
