Epson RX-8564LC - Manual (Page 16)

RX
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8564 LC
Page
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13 ETM12E-01
13.1.2. Control register 2 ( Reg
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01 [h] )
Address [h] Function bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
01 Control 2 0 × 0 TI / TP AF TF AIE TIE
•
This register is used to monitor various interrupt event settings and the conditions under which various interrupt-
related events occur.
1) TI / TP bit ( Interrupt Signal Output Mode Select. Interrupt / Periodic )
When a fixed-cycle timer interrupt event occurs (when the TF bit goes from "0" to 1") , this bit specifies
whether the interrupt operation occurs just once or repeatedly.
Writing "1"
to this bit sets repeated operation.
Writing "0" to this bit sets single-shot operation.
∗
For details, see "9.2. Fixed-cycle Timer Interrupt Function ".
2) AF bit ( Alarm Flag )
This is a flag bit that retains the result when an alarm interrupt event has been detected.
When an alarm interrupt event occurs, this bit's value changes from "0" to "1".
∗
For details, see "9.3. Alarm Interrupt Function".
3) TF bit ( Timer Flag )
This is a flag bit that retains the result when a fixed-cycle timer interrupt event has been detected.
When a fixed-cycle timer interrupt event occurs, this bit's value changes from "0" to "1".
∗
For details, see "9.2. Fixed-cycle Timer Interrupt Function ".
4) AIE bit ( Alarm Interrupt Enable )
This bit sets the operation of the /INT interrupt signal when an alarm interrupt event has occurred (the AF bit
value changes from "0"
to "1").
When a "1" is written to this bit, occurrence of an interrupt event causes a low-level interrupt signal to be
output from /INT pin.
Writing "0" to this bit prohibits low-level output from the /INT pin.
∗
For details, see "9.3. Alarm Interrupt Function".
5) TIE bit ( Timer Interrupt Enable )
This bit sets the operation of the /INT interrupt signal when a fixed-cycle interrupt event has occurred (the
TF bit value changes from "0"
to "1").
When a "1" is written to this bit, occurrence of an interrupt event causes a low-level interrupt signal to be
output from /INT pin.
Writing "0" to this bit prohibits low-level output from the /INT pin.
∗ For details, see "9.2. Fixed-cycle Timer Interrupt Function ".