AT80C51RD2 Atmel Corporation, AT80C51RD2 Datasheet - Page 47

• Manufacturer Part Number: AT80C51RD2
• Manufacturer: Atmel Corporation

Specifications of AT80C51RD2

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

4113D–8051–01/09
Reset Value = 0000 0000b
Bit addressable
Table 12-3.
IPL0 - Interrupt Priority Register (B8h)
Reset Value = X000 0000b
Bit addressable
Table 12-4.
IPH0 - Interrupt Priority High Register (B7h)
Number
Bit
7
7
7
6
5
4
3
2
1
0
-
-
IPL0 Register
IPH0 Register
Mnemonic Description
PPCH
PPCL
PPCL
PX1L
PX0L
PT2L
PT1L
PT0L
PSL
Bit
6
6
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
PCA interrupt priority bit
Refer to PPCH for priority level.
Timer 2 overflow interrupt priority bit
Refer to PT2H for priority level.
Serial port priority bit
Refer to PSH for priority level.
Timer 1 overflow interrupt priority bit
Refer to PT1H for priority level.
External interrupt 1 priority bit
Refer to PX1H for priority level.
Timer 0 overflow interrupt priority bit
Refer to PT0H for priority level.
External interrupt 0 priority bit
Refer to PX0H for priority level.
PT2H
PT2L
5
5
PSH
PSL
4
4
PT1H
PT1L
3
3
PX1L
PX1H
2
2
AT80C51RD2
PT0L
PT0H
1
1
PX0H
PX0L
0
0
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