AT89LP428 Atmel Corporation, AT89LP428 Datasheet - Page 33

• 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

Table 9-4.
Table 9-5.
3654A–MICRO–8/09
Symbol
IP1D
PCH
PT2H
PSH
PT1H
PX1H
PT0H
PX0H
Symbol
ESP
ECC
EGP
IPH = B7H
Not Bit Addressable
Bit
IE = B4H
Not Bit Addressable
Bit
Function
Interrupt Priority 1 Disable. Set IP1D to 1 to disable all interrupts with priority level one. Clear to 0 to enable all interrupts
with priority level one when EA = 1.
Comparator Interrupt Priority High
Timer 2 Interrupt Priority High
Serial Port Interrupt Priority High
Timer 1 Interrupt Priority High
External Interrupt 1 Priority High
Timer 0 Interrupt Priority High
External Interrupt 0 Priority High
Function
Serial Peripheral Interface Interrupt Enable
Compare/Capture Array Interrupt Enable
General-purpose Interrupt Enable
IPH – Interrupt Priority High Register
IE2 – Interrupt Enable 2 Register
IP1D
7
–
7
PCH
6
–
6
PT2H
5
–
5
PSH
4
–
4
PT1H
3
–
3
PX1H
ESP
2
2
Reset Value = 0000 0000B
Reset Value = xxxx x000B
AT89LP428/828
PT0H
ECC
1
1
PX0H
EGP
0
0
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