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To turn off the OSD block to save
power:
1. Write a 0 to OSD (OSD1, bit
10).
2. Wait for the next VSYNC input.
3. Write a 0 to OSDPOFF (PCNT0,
bit 7), turning the clock off.
If you turn the clock off before the
VSYNC input, power usage may
not drop or the microcontroller
may halt.
Panasonic Semiconductor Development Company
OSDPOFF: OSD circuit enable
Setting this bit to 0 shuts off the system clock supply to the OSD block,
reducing power dissipation. The program must write a 1 to this bit before
writing any values to the OSD registers.
0: Disable
1: Enable
PLLPOFF: PLL circuit enable
0: Enable
1: Stop
ADC1ON: ADC circuit enable for closed-caption decoder 1
0: Disable
1: Enable
ADC0ON: ADC circuit enable for closed-caption decoder 0
0: Disable
1: Enable
HCNTOFF: H counter circuit enable
0: Enable
1: Disable
RMCOFF: IR remote signal receiver circuit enable
0: Enable
1: Disable
VBI1OFF: Closed-caption decoder 1 circuit enable
0: Enable
1: Disable
VBI0OFF: Closed-caption decoder 0 circuit enable
0: Enable
1: Disable
Setting the HCNTOFF, RMCOFF, VBI1OFF, or VBI0OFF bits to 1 shuts
off the system clock supply to the associated block, which reduces power
dissipation.
286
Panasonic
I/O Port Control Registers
MN102H75K/F75K/85K/F85K LSI User Manual
I/O Ports
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