42
3621A–MICRO–6/06
AT89LP216 [Preliminary]
Figure 17-1. Serial Port Mode 0
INTERNAL BUS
1/2 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“