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P89C51RD2BBD/01,55

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48P49-P51P52-P54P55-P57P58-P60P61-P63P64-P66P67-P68
Philips Semiconductors Preliminary data
P89C51RA2/RB2/RC2/RD2xx80C51 8-bit Flash microcontroller family
8KB/16KB/32KB/64KB ISP/IAP Flash with 512B/512B/512B/1KB RAM
2002 Jul 18
25
80C51 Internal Bus
SBUF
Zero Detector
D Q
S
CL
Write
to
SBUF
TX Control
TX Clock Send
DataStart
RX Control
Start
RX Clock RI
T1
Serial
Port
Interrupt
Input Shift Register
(9 Bits)
Load
SBUF
Shift
SBUF
Read
SBUF
80C51 Internal Bus
TxD
TB8
÷ 16
1-to-0
Transition
Detector
Sample
÷ 2
Timer 1
Overflow
SMOD = 1
SMOD = 0
Shift
Bit Detector
Transmit
Send
S1P1
Shift
TX
Clock
Write to SBUF
Start Bit
TxD
Stop BitD0 D1 D2 D3 D4 D5 D6 D7
TI
RxD
RX
Clock
÷ 16 Reset
Start
Bit
RxD
Stop BitD0 D1 D2 D3 D4 D5 D6 D7
Bit Detector
Sample Times
Shift
RI
Receive
Data
÷ 16
Load
SBUF
Shift
1FFH
SU00540
Figure 15. Serial Port Mode 1
Philips Semiconductors Preliminary data
P89C51RA2/RB2/RC2/RD2xx80C51 8-bit Flash microcontroller family
8KB/16KB/32KB/64KB ISP/IAP Flash with 512B/512B/512B/1KB RAM
2002 Jul 18
26
80C51 Internal Bus
SBUF
Zero Detector
D Q
S
CL
Write
to
SBUF
TX Control
TX Clock Send
Data
Start
RX Control
Start
Load
SBUF
RX Clock
T1
Serial
Port
Interrupt
Input Shift Register
(9 Bits)
Load
SBUF
Shift
SBUF
Read
SBUF
80C51 Internal Bus
TxD
TB8
÷ 16
1-to-0
Transition
Detector
Sample
÷ 2
SMOD = 1
SMOD = 0
Shift
Bit Detector
RxD
Stop Bit
Gen.
Mode 2
Phase 2 Clock
(1/2 f
OSC
)
R1
÷ 16
Shift
1FFH
Transmit
Send
S1P1
Shift
TX
Clock
Write to SBUF
Start Bit
TxD
Stop BitD0 D1 D2 D3 D4 D5 D6 D7
TI
RX
Clock
÷ 16 Reset
Start
Bit
RxD
Stop BitD0 D1 D2 D3 D4 D5 D6 D7
Bit Detector
Sample Times
Shift
RI
Receive
Data
(SMOD is
PCON.7)
TB8
RB8
Stop Bit Gen.
SU00541
Figure 16. Serial Port Mode 2
Philips Semiconductors Preliminary data
P89C51RA2/RB2/RC2/RD2xx80C51 8-bit Flash microcontroller family
8KB/16KB/32KB/64KB ISP/IAP Flash with 512B/512B/512B/1KB RAM
2002 Jul 18
27
80C51 Internal Bus
SBUF
Zero Detector
D Q
S
CL
Write
to
SBUF
TX Control
TX Clock Send
DataStart
RX Control
Start
RX Clock
T1
Serial
Port
Interrupt
Input Shift Register
(9 Bits)
Load
SBUF
Shift
SBUF
Read
SBUF
80C51 Internal Bus
TxD
TB8
÷ 16
1-to-0
Transition
Detector
Sample
÷ 2
Timer 1
Overflow
SMOD = 1
SMOD = 0
Shift
Bit Detector
RxD
R1
÷ 16
Load
SBUF
Shift
1FFH
Transmit
Send
S1P1
Shift
TX
Clock
Write to SBUF
Start Bit
TxD
Stop BitD0 D1 D2 D3 D4 D5 D6 D7
TI
RX
Clock
÷ 16 Reset
Start
Bit
RxD
Stop BitD0 D1 D2 D3 D4 D5 D6 D7
Bit Detector
Sample Times
Shift
RI
Receive
Data
TB8
RB8
Stop Bit Gen.
SU00542
Figure 17. Serial Port Mode 3
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48P49-P51P52-P54P55-P57P58-P60P61-P63P64-P66P67-P68

P89C51RD2BBD/01,55

Mfr. #:
Buy P89C51RD2BBD/01,55
Manufacturer:
NXP Semiconductors
Description:
IC MCU 8BIT 64KB FLASH 44LQFP
Lifecycle:
New from this manufacturer.
Delivery:
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