AT80C51RD2 Atmel Corporation, AT80C51RD2 Datasheet - Page 49

• 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 = XXXX XXX0b
Bit addressable
Table 12-6.
IPL1 - Interrupt Priority Register (B2h)
Reset Value = XXXX XXX0b
Bit addressable
Table 12-7.
Number
Number
Bit
Bit
7
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
-
IPL1 Register
IPH1 Register
Mnemonic Description
Mnemonic Description
KBDL
KBD
Bit
Bit
6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Keyboard interrupt Enable bit
Cleared to disable keyboard interrupt.
Set to enable keyboard interrupt.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Keyboard Interrupt Priority bit
Refer to KBDH for priority level.
5
-
4
-
3
-
2
-
AT80C51RD2
1
-
KBDL
0
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