Epson RX-8564LC Backup recovery, Set current time, Read current time, Page −, ETM12E-01, processing, 5)Example of clock and calendar read processing

RX − 8564 LC

3) Example of processing to recover from backup mode

Backup recovery

processing

	∗ 1	No ( VL = " 1 " )		∗ 2		∗ 1) Check the VL bit (Voltage Low Flag).
VL = " 0 " ?
					∗ 3	∗ 2) When the VL bit = "1", it may be due to
Yes						an error during backup (clock data or
( VL = " 0 " )			Initialization			register settings may have been lost,
						due to a voltage drop, etc.), so be sure
						to initialize.
						∗ 3) Be sure to initialize all registers. (For
						further description of initialization, see
						"Initialization" below.)
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4) Example of clock and calendar write processing

Set current time

STOP ← " 1 "

Write current time

STOP ← " 0 "

•Write "1" to the STOP bit to prevent clock updates while setting the current time.

•Write the data (among the [Year/Month/Day [day of week]:hour:minute:second] data) that needs to be set (or reset).

∗When initializing be sure to initialize all of the data.

•Zero-clear the STOP bit to start (restart) the clock's operation.

∗The clock starts from the set [second] + 500 ms (500 ms after the set second). (The first [second] update occurs 500 ms later.)

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5)Example of clock and calendar read processing

Read current time

Read current time	• The required information (among the [Year/Month/Day [day of
	week]:hour:minute:second] data) is read within one second.
	∗ There is no need to manipulate the STOP bit.
To next process

Page − 30 ETM12E-01