P89C54X2BA NXP Semiconductors, P89C54X2BA Datasheet - Page 25

• Manufacturer Part Number: P89C54X2BA
• Manufacturer: NXP Semiconductors

Specifications of P89C54X2BA

• Cpu Family: 89C
• Device Core: 80C51
• Device Core Size: 8b
• Frequency (max): 20MHz
• Interface Type: UART
• Program Memory Type: Flash
• Program Memory Size: 16KB
• Total Internal Ram Size: 256Byte
• # I/os (max): 32
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Instruction Set Architecture: CISC
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: PLCC
• Lead Free Status / Rohs Status: Compliant

Philips Semiconductors
2002 Jun 06
80C51 8-bit Flash microcontroller family
4K/8K/16K/32K Flash
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
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
P89C51X2/52X2/54X2/58X2
Shift
D7
D7
Stop Bit
Stop Bit
Preliminary data
TxD
Transmit
Receive
SU00540