AT89C51RC2 Atmel Corporation, AT89C51RC2 Datasheet - Page 58

• Manufacturer Part Number: AT89C51RC2
• Manufacturer: Atmel Corporation

Specifications of AT89C51RC2

• Flash (kbytes): 32 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Sram (kbytes): 1.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

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AT89C51RB2/RC2
Table 45. IPL0 Register
IPL0 - Interrupt Priority Register (B8h)
Reset Value = X000 0000b
Bit addressable
Number
Bit
7
-
7
6
5
4
3
2
1
0
Mnemonic Description
PPCL
PPCL
PX1L
PX0L
PT2L
PT1L
PT0L
PSL
Bit
6
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
PCA Interrupt Priority Bit
see PPCH for priority level.
Timer 2 Overflow Interrupt Priority Bit
see PT2H for priority level.
Serial Port Priority Bit
see PSH for priority level.
Timer 1 Overflow Interrupt Priority Bit
see PT1H for priority level.
External Interrupt 1 Priority Bit
see PX1H for priority level.
Timer 0 Overflow Interrupt Priority Bit
see PT0H for priority level.
External Interrupt 0 Priority Bit
see PX0H for priority level.
PT2L
5
PSL
4
PT1L
3
PX1L
2
PT0L
1
4180E–8051–10/06
PX0L
0