7220 Datasheet, PDF (209/303 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPLICATION
5.5 Example of I²C-BUS control by software (M37220M3-XXXSP/FP)
5.5.6 Flowchart of data setting according to key processing
Figures 5.5.13 to 5.5.15 show the flowcharts of controlling the M52340SP when there are various event
inputs to the actual TV system.
(1) Poweron processing by “power key“ input
Power on
Wait for stabilizing time to supply
power source.
•Set write data register of M52340SP
•To mute video and audio;
MUTE (D6 at sub-address 0B 16)←“1”
A MUTE (D6 at sub-address 01 16)←“1”
Related processings:
•OSD when power on
•Write last data to E ²PROM
, etc.
Wait for muting time
To release mute of picture and sound:
MUTE (D6 at sub-address 0B 16)←“0”
A MUTE (D6 at sub-address 01 16)←“0”
END
Fig. 5.5.13 Flowchart of poweron processing
5-36
7220 Group User’s Manual