Rainbow-electronics T89C51CC02 Bedienungsanleitung PDF herunterladen (Seite 127)

Rev.A - May 17, 2001 127

Preliminary

T89C51CC02

IPH0 (B7h)

Interrupt High Priority Register

Reset Value: X000 0000b

Figure 131. IPL0 Register

7 6 5 4 3 2 1 0

- PPCH PT2H PSH PT1H PX1H PT0H PX0H

Bit Number Bit Mnemonic Description

Reserved

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

6 PPCH

EWC-PCA Counter Interrupt Priority level most significant bit

PPCH PPC Priority level

0 0 Lowest

1 1 Highest priority

5 PT2H

Timer 2 overflow interrupt High Priority bit

PT2H PT2 Priority Level

0 0 Lowest

1 1 Highest

4 PSH

Serial port High Priority bit

PSH PS Priority Level

0 0 Lowest

1 1 Highest

3 PT1H

Timer 1 overflow interrupt High Priority bit

PT1H PT1 Priority Level

0 0 Lowest

1 1 Highest

2 PX1H

External interrupt 1 High Priority bit

PX1H PX1 Priority Level

0 0 Lowest

1 1 Highest

1 PT0H

Timer 0 overflow interrupt High Priority bit

PT0H PT0 Priority Level

0 0 Lowest

1 1 Highest

0 PX0H

External interrupt 0 high priority bit

PX0H PX0 Priority Level

0 0 Lowest

1 1 Highest

1 2 ... 122 123 124 125 126 127 128 129 130 131 132 ... 136 137

T89C51CC02 1

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