ZUSBOPTSC01ZACG datasheet(78/282 Pages) ZILOG

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PS022827-1212

P R E L I M I N A R Y

Interrupt Control Register Definitions

Z8 Encore! XP® F082A Series

Product Specification

Interrupt Request 1 Register

The Interrupt Request 1 (IRQ1) Register, shown in Table 36, stores interrupt requests for

both vectored and polled interrupts. When a request is presented to the interrupt controller,

the corresponding bit in the IRQ1 Register becomes 1. If interrupts are globally enabled

(vectored interrupts), the interrupt controller passes an interrupt request to the eZ8 CPU. If

interrupts are globally disabled (polled interrupts), the eZ8 CPU can read the Interrupt

Request 1 Register to determine if any interrupt requests are pending.

[4]



U0RXI

UART 0 Receiver Interrupt Request

0 = No interrupt request is pending for the UART 0 receiver.



1 = An interrupt request from the UART 0 receiver is awaiting service.

[3]



U0TXI

UART 0 Transmitter Interrupt Request

0 = No interrupt request is pending for the UART 0 transmitter.



1 = An interrupt request from the UART 0 transmitter is awaiting service.

[2:1]

Reserved

These bits are reserved and must be programmed to 00.

[0]



ADCI

ADC Interrupt Request

0 = No interrupt request is pending for the analog-to-digital Converter.



1 = An interrupt request from the Analog-to-Digital Converter is awaiting service.

Table 36. Interrupt Request 1 Register (IRQ1)

Bit

Field

PA7VI

PA6CI

PA5I

PA4I

PA3I

PA2I

PA1I

PA0I

RESET

00000000

R/W

R/WR/W

R/WR/WR/WR/WR/WR/W

Address

FC3H

Bit

Description

[7]



PA7VI

Port A Pin 7 or LVD Interrupt Request

0 = No interrupt request is pending for GPIO Port A or LVD.



1 = An interrupt request from GPIO Port A or LVD.

[6]



PA6CI

Port A Pin 6 or Comparator Interrupt Request

0 = No interrupt request is pending for GPIO Port A or Comparator.



1 = An interrupt request from GPIO Port A or Comparator.

[5:0]



PA5I

Port A Pin x Interrupt Request

0 = No interrupt request is pending for GPIO Port A pin x.



1 = An interrupt request from GPIO Port A pin x is awaiting service.

Note: x indicates the specific GPIO port pin number (0–5).

Bit

Description (Continued)

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