p80c52x2 NXP Semiconductors, p80c52x2 Datasheet - Page 28
p80c52x2
Manufacturer Part Number
p80c52x2
Description
80c51 8-bit Microcontroller Family 4k/8k/16k/32k Rom/otp 128b/256b Ram
Manufacturer
NXP Semiconductors
Datasheet
1.P80C52X2.pdf
(62 pages)
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Philips Semiconductors
2003 Jan 24
80C51 8-bit microcontroller family
4K/8K/16K/32K ROM/OTP, low voltage (2.7 to 5.5 V),
low power, high speed (30/33 MHz)
Data
Shift
TxD
TI
Stop Bit Gen.
RxD
Shift
Bit Detector
Sample Times
RI
Clock
Clock
RX
TX
Mode 2
2
Write to SBUF
12-clock mode;
f
Phase 2 Clock
OSC
(1/2 f
mode)
in 6-clock
OSC
SMOD = 1
SMOD = 0
(SMOD is
PCON.7)
16 Reset
Start Bit
in
Send
RxD
Start
Bit
S1P1
SBUF
Write
D0
D0
to
Transition
Detector
1-to-0
Sample
D1
D1
Interrupt
Serial
16
Port
D2
D2
D
CL
TB8
Figure 16. Serial Port Mode 2
S
Bit Detector
Q
TX Clock
Start
Read
SBUF
Start
D3
D3
16
Stop Bit
RX Clock
Load
SBUF
Gen.
Zero Detector
D4
28
D4
TX Control
RX Control
80C51 Internal Bus
80C51 Internal Bus
SBUF
Input Shift Register
T1
R1
D5
D5
SBUF
Shift
(9 Bits)
1FFH
D6
D6
Load
SBUF
Data
Send
Shift
Shift
D7
D7
P80C3xX2; P80C5xX2;
TB8
RB8
Stop Bit
Stop Bit
P87C5xX2
Product data
TxD
Transmit
Receive
SU01627
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