P80C3XX2_8XC5XX2 NXP Semiconductors, P80C3XX2_8XC5XX2 Datasheet - Page 27

• Manufacturer Part Number: P80C3XX2_8XC5XX2
• Description: The Philips microcontrollers described in this data sheet arehigh-performance static 80C51 designs incorporating Philips?high-density CMOS technology with operation from 2
• Manufacturer: NXP Semiconductors

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
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
D2
D2
D
CL
TB8
Figure 15. 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
27
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
Shift
D7
D7
P80C3xX2; P80C5xX2;
Stop Bit
Stop Bit
P87C5xX2
Product data
TxD
Transmit
Receive
SU00540