p87c51rb2fa NXP Semiconductors, p87c51rb2fa Datasheet - Page 25
p87c51rb2fa
Manufacturer Part Number
p87c51rb2fa
Description
80c51 8-bit Microcontroller Family
Manufacturer
NXP Semiconductors
Datasheet
1.P87C51RB2FA.pdf
(67 pages)
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P87C51RB2FA
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Philips Semiconductors
2003 Jan 24
80C51 8-bit microcontroller family
with 512B/1KB RAM, low voltage (2.7 to 5.5 V), low power, high
speed (30/33 MHz)
Data
Shift
TxD
TI
RxD
Shift
Bit Detector
Sample Times
RI
SMOD = 0
Clock
Clock
RX
TX
Overflow
Write to SBUF
Timer 1
2
SMOD = 1
16 Reset
Start Bit
Send
RxD
Start
Bit
S1P1
SBUF
Write
Interrupt
D0
D0
Serial
to
Port
Transition
Detector
1-to-0
Sample
D1
D1
16
8KB/16KB/32KB/64KB OTP
D2
D2
D
CL
TB8
Figure 10. Serial Port Mode 1
S
Bit Detector
Q
TX Clock
Start
Read
SBUF
Start
D3
D3
16
Load
SBUF
RX Clock RI
Zero Detector
D4
D4
25
TX Control
RX Control
80C51 Internal Bus
80C51 Internal Bus
T1
SBUF
Input Shift Register
D5
D5
SBUF
Shift
(9 Bits)
1FFH
D6
D6
Load
SBUF
Data
Send
Shift
P87C51RA2/RB2/RC2/RD2
Shift
D7
D7
Stop Bit
Stop Bit
Product data
TxD
Transmit
Receive
SU00540
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