Atmel C51 Arkusz Danych Pobierz pdf (Strona 62)

AT89C51RB2/RC2

4180E–8051–10/06

Table 49. IPH1 Register

IPH1 - Interrupt Priority High Register (B3h)

Reset Value = XXXX X000b

Not bit addressable

76543210

- - - - - SPIH - KBDH

Bit

Number

Bit

Mnemonic Description

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.

2SPIH

SPI Interrupt Priority High Bit

SPIH

SPIL Priority Level

00Lowest

1 1 Highest

Reserved

The value read from this bit is indeterminate. Do not set this bit.

0 KBDH

Keyboard Interrupt Priority High Bit

KB DH

KBDL Priority Level

00Lowest

1 1 Highest

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 126 127

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Atmel C51 Arkusz Danych Strona 62