Rev. 1.0, 02/00, page 858 of 1141
Bit 11
4/2fsc External Input Select Bit (FSCEXT): Selects 4fsc or 2fsc input.
Bit 11
FSCEXT
Description
0
4/2fsc oscillator uses a crystal oscillator
(Initial value)
1
4/2fsc uses a dedicated amplifier circuit for external clock signal input
Bit 10
Reserved: Always read as 0. When 1 is written to this bit, correct operation is not
guaranteed.
Bit 9
OSDV Interrupt Enable Bit (OSDVE): Enables or disables OSDV interrupts.
Bit 9
OSDVE
Description
0
The OSDV interrupt is disabled
(Initial value)
1
The OSDV interrupt is enabled
Bit 8
OSDV Interrupt Flag (OSDVF): Set when the OSD detects the Vsync signal. The timing
for setting this flag differs depending on the OSD display mode. In superimposed mode, it is set
on the external Vsync signal; in text display mode it is set on the internally generated Vsync
signal.
Bit 8
OSDVF
Description
0
[Clearing condition]
When 0 is written after reading 1
(Initial value)
1
[Setting condition]
When OSD detects the Vsync signal
Bits 7 to 3
Reserved: Always read as 1. When 0 is written to these bits, correct operation is not
guaranteed.