at89lp428-25pu ATMEL Corporation, at89lp428-25pu Datasheet - Page 83

• Manufacturer Part Number: at89lp428-25pu
• Description: 8-bit Microcontroller With 4k/8k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

Figure 16-1. Serial Port Mode 0
3654A–MICRO–8/09
SEND
SHIFT
RXD
TXD
TI
RI
RECEIVE
SHIFT
RXD
TXD
OVERFLOW
(SHIFT CLOCK)
(SHIFT CLOCK)
(DATA OUT)
(DATA IN)
TIMER 1
WRITE TO SBUF
WRITE TO SCON (CLEAR RI)
TB8
SMOD1
1
÷2
÷2
0
0
f
osc
1
“1“
INTERNAL BUS
INTERNAL BUS
SM2
AT89LP428/828
83