AT89C51ED2 Atmel Corporation, AT89C51ED2 Datasheet - Page 78
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AT89C51ED2
Manufacturer Part Number
AT89C51ED2
Description
Manufacturer
Atmel Corporation
Specifications of AT89C51ED2
Flash (kbytes)
64 Kbytes
Max. Operating Frequency
60 MHz
Cpu
8051-12C
Max I/o Pins
32
Spi
1
Uart
1
Sram (kbytes)
2
Eeprom (bytes)
2048
Self Program Memory
API
Operating Voltage (vcc)
2.7 to 5.5
Timers
4
Isp
UART
Watchdog
Yes
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78
AT89C51RD2/ED2
Table 17-7.
IPL1 - Interrupt Priority Register (B2h)
Reset Value = XXXX X000b
Bit addressable
Number
Bit
7
7
6
5
4
3
2
1
0
-
Mnemonic
IPL1 Register
KBDL
SPIL
Bit
6
-
-
-
-
-
-
-
Description
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.
SPI interrupt Priority bit
Refer to SPIH for priority level.
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
-
SPIL
2
TWIL
1
4235K–8051–05/08
KBDL
0