Control Of Identification Converter Lsi (I315); I 2 C Bus Control; Power On Sequence; Power Off Sequence - Elo TouchSystems ET17 XXL Series Service Manual

Port Pin No.
GPIO1 I303,41
GPIO6 I303,46
GPIO3 I303,43
GPIO2 I303,42
GPIO7 I303,47
8.3.3 Functions
Control is effected for the push-switches to be used when the user changes the
parameters, in order to modify the respective setting values. Whether the switch
has been pressed is identified with the switch input level that is turned "L".
Each switch input port is pulled up at outside of ASIC.
Each parameter is stored in the EEPROM, the contents of which are updated as
required.
2
8.4 I C bus control
8.4.1 Related ports of I303
2
8.4.2 I C-controlled functions
The following functional controls are effected by I
(1) Control of EEPROM I303 for parameter setting.
Port
GPIO13
GPIO12
(2) Control of audio preamplifier.

8.5 Power ON sequence

When the POWER switch is pressed, the POWER OFF signal is turned "H". When
this "H" potential is detected, the CPU begins to establish the respective power
supplies according to the sequence shown below.

8.6 Power OFF sequence

When the POWER switch is pressed while the power supply is ON, the POWER ON
signal is turned "H". When this "H" potential is detected, the CPU begins to turn off
the respective power supplies according to the sequence shown below.
I/O Signal Name
1 Menu
1 +
1 -
1 Down
1 Power
Pin No. I/O
52 I
51 I/O
-
47
Function
Menu switch input
Select page right/Plus
Select counter-clock
wise/minus/mute
Select switch input
Soft power switch input
2
C.
Signal name Function
IICCLK IIC bus clock
IICDATA IIC bus data
-
Remarks
Enter/Withdraw from OSD
◤ key
◢ key
Select key
Power (key)