AT89C51RC2 Atmel Corporation, AT89C51RC2 Datasheet - Page 59

• 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

4180E–8051–10/06
Table 46. IPH0 Register
IPH0 - Interrupt Priority High Register (B7h)
Reset Value = X000 0000b
Not bit addressable
Number
Bit
7
7
6
5
4
3
2
1
0
-
Mnemonic Description
PPCH
PPCH
PX1H
PX0H
PT2H
PT1H
PT0H
PSH
Bit
6
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
PCA Interrupt Priority High Bit
PPCHPPCL
0
0
1
1
Timer 2 Overflow Interrupt Priority High Bit
PT2HPT2L
0
0
1
1
Serial Port Priority High Bit
PSH PSL
0
0
1
1
Timer 1 Overflow Interrupt Priority High Bit
PT1HPT1L
0
0
1
1
External Interrupt 1 Priority High Bit
PX1HPX1L
0
0
1
1
Timer 0 Overflow Interrupt Priority High Bit
PT0HPT0L
0
0
1
1
External Interrupt 0 Priority High Bit
PX0H PX0L
0
0
1
1
PT2H
5
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
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
PSH
4
PT1H
3
AT89C51RB2/RC2
PX1H
2
PT0H
1
PX0H
0
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