Rainbow-electronics AT89C5132 Manuale Utente Scaricare il pdf (Pagina 45)

45

AT8xC5132

4173A–8051–08/02

Table 55. IPL1 Register

IPL1 (S:B2h) – Interrupt Priority Low Register 1

Reset Value = 0000 0000b

76543210

- IPLUSB - IPLKB IPLADC IPLSPI IPLI2C IPLMMC

Bit

Number

Bit

Mnemonic Description

7-

Reserved

The values read from this bit is always 0. Do not set this bit.

6IPLUSB

USB Interrupt Priority Level LSB

Refer to Table 48 for priority level description.

5-

Reserved

The values read from this bit is always 0. Do not set this bit.

4IPLKB

Keyboard Interrupt Priority Level LSB

Refer to Table 48 for priority level description.

3IPLADC

A-to-D Converter Interrupt Priority Level LSB

Refer to Table 48 for priority level description.

2IPLSPI

SPI Interrupt Priority Level LSB

Refer to Table 48 for priority level description.

1IPLI2C

Reserved

The values read from this bit is always 0. Do not set this bit.

0IPLMMC

MMC Interrupt Priority Level LSB

Refer to Table 48 for priority level description.

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 161 162

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