p87lpc778 NXP Semiconductors, p87lpc778 Datasheet - Page 59

• 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 23. Serial port mode 0.
WRITE to SCON
TXD (shift clock)
TxD (shift clock)
RXD (data out)
(clear RI)
(data in)
write to
receive
SBUF
RXD
send
shift
shift
RI
TI
write to
SBUF
REN
S6
RI
S1 ... S6
S1 ... S6 S1 ... S6
serial port
interrupt
D
CL
SBUF
SBUF
load
read
S
S1 ... S6
Q
D0
TX CLOCK
START
TX CLOCK
START
1
D0
S1 ... S6
1
D1
INPUT SHIFT REGISTER
1
80C51 internal bus
Rev. 01 — 31 March 2004
D1
RX CONTROL
TX CONTROL
S1 ... S6 S1 ... S6 S1 ... S6
ZERO DETECTOR
D2
1
SBUF
80C51 internal bus
TI
RI
D2
1
D3
SBUF
1
D3
1
D4
RECEIVE
SHIFT
SEND
SHIFT
0
D4
S1 ... S6
D5
CMOS single-chip 8-bit microcontroller
D5
S1 ... S6
D6
function
P3.0 alt
RXD
input
D6
S1 ... S6
CLOCK
SHIFT
D7
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
D7
S1 ... S6
P87LPC778
S1 ... S6
P3.1 alt
function
output
P3.0 alt
function
TxD
output
RxD
002aaa641
transmit
receive
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