AT89LP51 Atmel Corporation, AT89LP51 Datasheet - Page 67

• Manufacturer Part Number: AT89LP51
• Manufacturer: Atmel Corporation

Specifications of AT89LP51

• Flash (kbytes): 4 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 36
• Uart: 1
• Sram (kbytes): 0.25
• Eeprom (bytes): 256
• Self Program Memory: IAP
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 3
• Isp: SPI
• Watchdog: Yes

Figure 14-5. Serial Port Mode 0 (Three-Wire)
3709D–MICRO–12/11
SEND
SHIFT
MOSI
SCK
MISO
TI
RI
(SHIFT CLOCK)
O VERF L O W
(DATA OUT)
(DATA IN)
TIMER 1
WRITE T O S B U F
TB8
SMOD1
1
÷2
÷2
0
0
f
sys
1
“1“
INTERNAL BUS
INTERNAL B U S
TI
SERIAL
PORT
INTERRUPT
SM2
MISO
P1.6 ALT
OUTPUT
FUNCTION
MOSI
P1.5 ALT
OUTPUT
FUNCTION
AT89LP51/52
SCK
P1.7 ALT
OUTPUT
FUNCTION
67