at89c51ac3-s3sim ATMEL Corporation, at89c51ac3-s3sim Datasheet - Page 120
at89c51ac3-s3sim
Manufacturer Part Number
at89c51ac3-s3sim
Description
At89c51ac3 Enhanced 8-bit Microcontroller With 64kb Flash Memory
Manufacturer
ATMEL Corporation
Datasheet
1.AT89C51AC3-S3SIM.pdf
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AT89C51AC3
Table 70. IPH1 Register
IPH1 (S:F7h)
Interrupt High Priority Register 1
Reset Value = XXXX 0X0Xb
Number
Bit
7
-
7
6
5
4
3
2
1
0
Mnemonic Description
PADCH
SPIH
Bit
6
-
-
-
-
-
-
-
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 Level Most Significant bit
SPIH SPIL Priority level
0
0
1
1
Reserved
The value read from this bit is indeterminate. Do not set this bit.
ADC Interrupt Priority Level Most Significant bit
PADCH PADCL Priority level
0
0
1
1
Reserved
The value read from this bit is indeterminate. Do not set this bit.
5
-
0
1
0
1
0
1
0
1
Lowest
Highest
Lowest
Highest
4
-
SPIH
3
2
-
4383D–8051–02/08
PADCH
1
0
-
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