at89c51rc2-slsil ATMEL Corporation, at89c51rc2-slsil Datasheet - Page 62
at89c51rc2-slsil
Manufacturer Part Number
at89c51rc2-slsil
Description
8-bit Microcontroller With 16k/ 32k Bytes Flash
Manufacturer
ATMEL Corporation
Datasheet
1.AT89C51RC2-SLSIL.pdf
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AT89C51RB2/RC2
Table 49. IPH1 Register
IPH1 - Interrupt Priority High Register (B3h)
Reset Value = XXXX X000b
Not bit addressable
Number
Bit
7
-
7
6
5
4
3
2
1
0
Mnemonic Description
KBDH
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.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
SPI Interrupt Priority High Bit
SPIHSPIL
0
0
1
1
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Keyboard Interrupt Priority High Bit
KB DHKBDL
0
0
1
1
5
-
0
1
0
1
0
1
0
1
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
4
-
3
-
SPIH
2
1
-
4180E–8051–10/06
KBDH
0
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