DS87C320-ENG datasheet(33/175 Pages) DALLAS

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High-Speed Microcontroller User’s Guide

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Interrupt Enable (IE)

SFR A8h

ES1

ET2

ES0

ET1

EX1

ET0

EX0

RW-0

R=Unrestricted Read, W=Unrestricted Write, -n=Value after Reset

Bit 7

Global Interrupt Enable. This bit controls the global masking of all interrupts

except Power-Fail Interrupt, which is enabled by the EPFI bit (WDCON.5).

0 = Disable all interrupt sources. This bit overrides individual interrupt mask

settings.

1 = Enable all individual interrupt masks. Individual interrupts will occur if

enabled.

ES1

Bit 6

Enable Serial Port 1 Interrupt. This bit controls the masking of the serial port

1 interrupt.

0 = Disable all serial port 1 interrupts.

1 = Enable interrupt requests generated by the RI_1 (SCON1.0) or TI_1

(SCON1.1) flags.

ET2

Bit 5

Enable Timer 2 Interrupt.

This bit controls the masking of the Timer 2

interrupt.

0 = Disable all Timer 2 interrupts.

1 = Enable interrupt requests generated by the TF2 flag (T2CON.7).

ES0

Bit 4

Enable Serial Port 0 Interrupt. This bit controls the masking of the serial port

0 interrupt.

0 = Disable all serial port 0 interrupts.

1 = Enable interrupt requests generated by the RI_0 (SCON0.0) or TI_0

(SCON0.1) flags.

ET1

Bit 3

Enable Timer 1 Interrupt.

This bit controls the masking of the Timer 1

interrupt.

0 = Disable all Timer 1 interrupts.

1 = Enable all interrupt requests generated by the TF1 flag (TCON.7).

EX1

Bit 2

Enable External Interrupt 1.

This bit controls the masking of external

interrupt 1.

0 = Disable external interrupt 1.

1 = Enable all interrupt requests generated by the INT0 pin.

ET0

Bit 1

Enable Timer 0 Interrupt.

This bit controls the masking of the Timer 0

interrupt.

0 = Disable all Timer 0 interrupts.

1 = Enable all interrupt requests generated by the TF0 flag (TCON.5).

EX0

Bit 0

Enable External Interrupt 0.

This bit controls the masking of external

interrupt 0.

0 = Disable external interrupt 0.

1 = Enable all interrupt requests generated by the INT0 pin.

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