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STLED325 データシート(PDF) 54 Page - STMicroelectronics

部品番号 STLED325
部品情報  Standby power management to host
PDF  62 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STLED325 データシート(HTML) 54 Page - STMicroelectronics

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State
STLED325
54/62
Doc ID 17576 Rev 1
8
State
8.1
Default state upon power-up
Table below shows the default state of the STLED325 upon power-up.
8.2
Initial state
On power application, the 10/16-pulse width is set and the display shows the value
configured in the LED display RAM before entering the standby mode. Thus if TUNE is
required to be shown on the LED upon wake-up, then the user must write the corresponding
digit and segments locations in the LED display memory before going into the standby mode
of operation. The value of the display changes only after user configuration.
If the user wishes to display the RTC value during standby, then the user must configure the
STLED325 by sending the appropriate command. If the user does not configure the
STLED325 to display the RTC in standby, the LED shows the same value as was written
previously in the LED display memory location.
Note that all the hot keys are disabled on power-up. Only the hot-keys (FP or RC) can be
detected to wake-up the system from standby condition.
Table 30.
Power-up defaults
Serial number
Function
Default state
1
Display
OFF
2
Key-scan
ON
3IR
Disabled
4
Display mode
8 segment/1 digit
5
Display address
10H with address increment
mode
6
RC protocol
Disabled
7
Dimming
10/16 duty factor
8
Hot keys (IR and FP)
Disabled
9
Guard timer
10s



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