AT89LP428 Atmel Corporation, AT89LP428 Datasheet - Page 40

• Manufacturer Part Number: AT89LP428
• Manufacturer: Atmel Corporation

Specifications of AT89LP428

• Flash (kbytes): 4 Kbytes
• Max. Operating Frequency: 25 MHz
• Cpu: 8051-1C
• Max I/o Pins: 30
• Spi: 1
• Uart: 1
• Sram (kbytes): 0.75
• Eeprom (bytes): 512
• Self Program Memory: IAP
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 3
• Isp: SPI/OCD
• Watchdog: Yes

40
AT89LP428/828
Table 10-6.
Port Pin
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P4.6
P4.7
Port Pin Alternate Functions
PxM0.y
P1M0.0
P1M0.1
P1M0.2
P1M0.3
P1M0.4
P1M0.5
P1M0.6
P1M0.7
P2M0.0
P2M0.1
P2M0.2
P2M0.3
P2M0.4
P2M0.5
P2M0.6
P2M0.7
P3M0.0
P3M0.1
P3M0.2
P3M0.3
P3M0.4
P3M0.5
P3M0.5
Configuration Bits
Not configurable
Not configurable
PxM1.y
P1M1.0
P1M1.1
P1M1.2
P1M1.3
P1M1.4
P1M1.5
P1M1.6
P1M1.7
P2M1.0
P2M1.1
P2M1.2
P2M1.3
P2M1.4
P2M1.5
P2M1.6
P2M1.7
P3M1.0
P3M1.1
P3M1.2
P3M1.3
P3M1.4
P3M1.5
P3M1.5
Alternate
Function
CMPA
CMPB
T2EX
MOSI
MISO
GPI0
GPI1
GPI2
GPI3
GPI4
GPI5
GPI6
GPI7
CCA
CCB
CCC
CCD
AIN0
AIN1
AIN2
AIN3
RXD
INT0
INT1
SCK
TXD
RST
SS
T2
T0
T1
Notes
Input-only
Input-only
Input-only
Input-only
RST must be disabled to use P3.6
Pin is tied to comparator output
Pin is tied to comparator output
3654A–MICRO–8/09