AT89C51AC3 Atmel Corporation, AT89C51AC3 Datasheet - Page 119

• Manufacturer Part Number: AT89C51AC3
• Manufacturer: Atmel Corporation

Specifications of AT89C51AC3

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 62.5
• Sram (kbytes): 2.25
• Eeprom (bytes): 2048
• Self Program Memory: API
• Operating Voltage (vcc): 3.0 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

4383D–8051–02/08
Table 69. IPL0 Register
IPH0 (B7h)
Interrupt High Priority Register
Reset Value = X000 0000b
Number
Bit
7
-
7
6
5
4
3
2
1
0
Mnemonic Description
PPCH
PPCH
PT2H
PT1H
PX1H
PT0H
PX0H
PSH
Bit
6
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
PCA Interrupt Priority Level Most Significant bit
PPCH PPC
0
0
1
1
Timer 2 Overflow Interrupt High Priority bit
PT2H PT2
0
0
1
1
Serial Port High Priority bit
PSH
0
0
1
1
Timer 1 Overflow Interrupt High Priority bit
PT1H PT1
0
0
1
1
External Interrupt 1 High Priority bit
PX1H PX1
0
0
1
1
Timer 0 Overflow Interrupt High Priority bit
PT0H PT0
0
0
1
1
External Interrupt 0 high priority bit
PX0H PX0
0
0
1
1
PT2H
5
PS
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
PSH
Priority level
Lowest
Highest priority
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
4
PT1H
3
PX1H
2
PT0H
1
PX0H
0
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