Rainbow Electronics AT89C5132 - Manual (Page 43)

43
AT8xC5132
4173A–8051–08/02
Table 53. IPH1 Register
IPH1 (S:B3h) – Interrupt Priority High Register 1
Reset Value = 0000 0000b
7 6 5 4 3 2 1 0
- IPHUSB – IPHKB IPHADC IPHSPI IPHI2C IPHMMC
Bit
Number
Bit
Mnemonic Description
7 -
Reserved
The values read from this bit is always 0. Do not set this bit.
6 IPHUSB
USB Interrupt Priority Level MSB
Refer to Table 48 for priority level description.
5 -
Reserved
The values read from this bit is always 0. Do not set this bit.
4 IPHKB
Keyboard Interrupt Priority Level MSB
Refer to Table 48 for priority level description.
3 IPHADC
A-to-D Converter Interrupt Priority Level MSB
Refer to Table 48 for priority level description.
2 IPHSPI
SPI Interrupt Priority Level MSB
Refer to Table 48 for priority level description.
1 IPHI2C
Reserved
The values read from this bit is always 0. Do not set this bit.
0 IPHMMC
MMC Interrupt Priority Level MSB
Refer to Table 48 for priority level description.