p87lpc778 NXP Semiconductors, p87lpc778 Datasheet - Page 60

• Manufacturer Part Number: p87lpc778
• Description: Cmos Single-chip 8-bit 80c51 Microcontroller 128-byte Data Ram, 8 Kb Otp
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 12378
Product data
Fig 24. Serial port mode 1.
sample times
bit detector
TX clock
write to
SBUF
clock
send
data
RxD
shift
TxD
shift
SMOD1 = 0
RX
RI
TI
overflow
timer 1
function
P3.0 alt
write to
2
SBUF
input
RxD
16 reset
SMOD1
= 1
TRANSITION
DETECTOR
1-TO-0
start
bit
start
16
bit
D
CL
TB8
D0
D0
S
DETECTOR
Q
SBUF
SBUF
load
START
TX CLOCK
BIT
read
START
D1
D1
16
CLOCK
Rev. 01 — 31 March 2004
RX
D2
D2
TX CONTROL
RX CONTROL
ZERO DETECTOR
INPUT SHIFT REGISTER
80C51 INTERNAL BUS
TI
80C51 internal bus
RI
D3
D3
SBUF
SBUF
D4
1FFH
LOAD SBUF
D4
SHIFT
SHIFT
SEND
DATA
D5
D5
CMOS single-chip 8-bit microcontroller
D6
serial port
interrupt
D6
D7
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
D7
stop bit
stop bit
P87LPC778
TxD
002aaa642
transmit
receive
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