Epson RX801SJ, Руководство по применению

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RX8010 SJ
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ETM37E-06
13.4. Time Update Interrupt Function
The time update interrupt function generates interrupt events at one-second or one-minute intervals, according to
the timing of the internal clock. This /IRQ1 status is automatically cleared
13.4.1. Related registers for time update interrupt functions.
Address [h]
Function bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
1D Extension Register FSEL1 FSEL0 USEL TE WADA TSEL2 TSEL1 TSEL0
1E Flag Register UF TF AF VLF
1F Control Register TEST STOP UIE TIE AIE TSTP - -
∗
Before entering settings for operations, we recommend writing a "0" to the UIE bit to prevent hardware interrupts
from occurring inadvertently while entering settings.
∗
When the STOP bit value is "1" time update interrupt events do not occur.
∗
Although the time update interrupt function cannot be fully stopped, if "0" is written to the UIE bit, the time update
interrupt function can be prevented from changing the /IRQ1 pin status to low.
1) USEL bit ( Update Interrupt Select )
This bit is used to select "second" update or "minute" update as the timing for generation of time update
interrupt events.
USEL Data Description
Write
0
Selects "second update" (once per second) as the timing for generation of
interrupt events
1
Selects "minute update" (once per minute) as the timing for generation of
interrupt events
2) UF bit ( Update Flag )
This flag bit value changes from "0" to "1" when a time update interrupt event occurs.
UF Data Description
Write
0
Clearing this bit to zero enables /IRQ1 low output to be canceled
(/IRQ1 remains Hi-z) when an time update interrupt event has occurred.
1 This bit is invalid after a "1" has been written to it.
Read
0
−
1
Time update interrupt events are detected.
(The result is retained until this bit is cleared to zero.)
3) UIE bit ( Update Interrupt Enable )
This bit selects whether to generate an interrupt signal or to not generate it.
UIE Data Description
Write / Read
0
1) Does not generate an interrupt signal. (/IRQ1 remains Hi-z)
2) Cancels interrupt signal triggered by time update interrupt event (/IRQ1
changes from low to Hi-z).
1 When an Update interrupt event occurs, an interrupt signal is generated.