AT89LP51RD2 Atmel Corporation, AT89LP51RD2 Datasheet - Page 66

• Manufacturer Part Number: AT89LP51RD2
• Manufacturer: Atmel Corporation

Specifications of AT89LP51RD2

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 42
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Adc Channels: 7
• Adc Resolution (bits): 10
• Adc Speed (ksps): 153.8
• Sram (kbytes): 2.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 4
• Isp: SPI/OCD/UART
• Watchdog: Yes

Table 9-5.
Table 9-6.
66
Symbol
IP0DIS
PPCL
PT2L
PSL
PT1L
PX1L
PT0L
PX0L
Symbol
IP2DIS
PADCL
PCMPL
PSPL
PTWL
PKBL
IPL0 = B8H
Bit Addressable
Bit
IPL1 = B2H
Bit Addressable
Bit
AT89LP51RD2/ED2/ID2 Preliminary
Function
Interrupt Level 0 Disable
Clear to enable all interrupts with priority level 0. Set to disable all interrupts with priority level 0.
PCA Interrupt Priority Low
Low order bit for PCA interrupt priority level.
Timer 2 Interrupt Priority Low
Low order bit for Timer 2 interrupt priority level.
Serial Port Interrupt Priority Low
Low order bit for UART interrupt priority level.
Timer 1 Interrupt Priority Low
Low order bit for Timer 1 interrupt priority level.
External Interrupt 1 Priority Low
Low order bit for INT1 interrupt priority level.
Timer 0 Interrupt Priority Low
Low order bit for Timer 0 interrupt priority level.
External Interrupt 0 Priority Low
Low order bit for INT0 interrupt priority level.
Function
Interrupt Level 2 Disable
Clear to enable all interrupts with priority level 2. Set to disable all interrupts with priority level 2.
ADC Interrupt Priority Low
Low order bit for ADC interrupt priority level.
Analog Comparator Interrupt Priority Low
Low order bit for Analog Comparator interrupt priority level.
SPI Interrupt Priority Low
Low order bit for SPI interrupt priority level.
TWI Interrupt Priority Low
Low order bit for TWI interrupt priority level.
Keyboard Interrupt Priority Low
Low order bit for Keyboard interrupt priority level.
IPL0 – Interrupt Priority Low Register 0
IPL1 – Interrupt Priority Low Register 1
IP0DIS
IP2DIS
7
7
PPCL
6
–
6
PADCL
PT2L
5
5
PCMPL
PSL
4
4
PT1L
3
–
3
PSPL
PX1L
2
2
Reset Value = 0000 0000B
Reset Value = 0000 0000B
PTWL
PT0L
1
1
PKBL
PX0L
3714A–MICRO–7/11
0
0