AC75 AT Command Set
19. Hardware Related Commands s
AC75_ATC_V01.002 Page 481 of 569 10/30/06
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19. Hardware Related Commands
The AT commands described in this chapter are related to the AC75's hardware interface. Further information
regarding this interface is available in the "AC75 Hardware Interface Description"[2].

19.1 AT+CCLK Real Time Clock

Syntax
Parameter Description
Format is "yy/mm/dd,hh:mm:ss", where the characters indicate the two last digits of the year, followed by month,
day, hour, minutes, seconds; for example 6th of July 2005, 22:10:00 hours equals to "05/07/06,22:10:00"
Factory default is "02/01/01,00:00:00"
Notes
•<time> is retained if the device enters the Power Down mode via AT^SMSO.
•<time> will be reset to its factory default if power is totally disconnected. In this case, the clock starts with
<time>= "02/01/01,00:00:00" upon next power-up.
• Each time AC75 is restarted it takes 2s to re-initialize the RTC and to update the current time. Therefore, it is
recommended to wait 2s before using the commands AT+CCLK and AT+CALA (for example 2s after
^SYSSTART has been output).
Test Command
AT+CCLK=?
Response(s)
OK
Read Command
AT+CCLK?
Response(s)
+CCLK: <time>
OK
Write Command
AT+CCLK=<time>
Response(s)
+CME ERROR: <err>
ERROR
OK
Reference(s) PIN ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge 4Last
GSM 07.07 - + + + + + + + + -
<time>(str)