Datasheet

85
4337K–USB–04/08
AT89C5130A/31A-M
Reset Value = X0XX X000b
Not bit addressable
Table 16-6. IPL1 Register
IPL1 - Interrupt Priority Register (B2h)
Reset Value = X0XX X000b
Not bit addressable
7 6 5 4 3 2 1 0
- PUSBL - - - PSPIL PTWIL PKBDL
Bit
Number
Bit
Mnemonic Description
7 -
Reserved
The value read from this bit is indeterminate. Do not set this bit.
6 PUSBL
USB Interrupt Priority bit
Refer to PUSBH for priority level.
5 -
Reserved
The value read from this bit is indeterminate. Do not set this bit.
4 -
Reserved
The value read from this bit is indeterminate. Do not set this bit.
3 -
Reserved
The value read from this bit is indeterminate. Do not set this bit.
2 PSPIL
SPI Interrupt Priority bit
Refer to PSPIH for priority level.
1 PTWIL
TWI Interrupt Priority bit
Refer to PTWIH for priority level.
0 PKBL
Keyboard Interrupt Priority bit
Refer to PKBH for priority level.