AT89C51RB2-RLTCM ATMEL [ATMEL Corporation], AT89C51RB2-RLTCM Datasheet - Page 60
AT89C51RB2-RLTCM
Manufacturer Part Number
AT89C51RB2-RLTCM
Description
8-bit Microcontroller with 16K/ 32K Bytes Flash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT89C51RB2-RLTCM.pdf
(125 pages)
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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
SPIH
0
0
1
1
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Keyboard Interrupt Priority High Bit
KB DH
0
0
1
1
5
-
SPIL
0
1
0
1
KBDL
0
1
0
1
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
4
-
3
-
SPIH
2
1
-
4180B–8051–04/03
KBDH
0
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