Sony SS-HQ1 Application Notes page 214

2. Timing for switch from LL to INT when external VD input is no longer detected (INTSW input =High)
For a fixed period of time (1VD period or longer), Ext-VD presence/absence detection is performed. If Ext-VD
absence is detected, "RESET output" is switched from High to Low and the CXD3172AR is reset. In addition,
for the period where "RESET output"=Low, "INT/LL Change signal output" is switched from High to Low. (The
"INTSW input" at this time is always High.)
INTSW
High
input
pulse
EXT-VD
input
RESET
output
LL
INT/LL
Change signal
INT
output
Fig 12.2-18 Timing for switch from LL to INT based on external VD input (INTSW input =High)
3. Timing for switch from INT to LL with external VD input (INTSW input : Low => High)
While "INTSW=Low", "INT/LL Change signal output" is output at Low, regardless of whether Ext-VD is present
or absent. After "INTSW input" switches from Low to High, Ext-VD presence/absence detection begins. If
Ext-VD presence is detected, then "RESET output" is switched from High to Low and the CXD3172AR is
reset. In addition, for the period where "RESET output"=Low, "INT/LL Change signal output" is switched from
Low to High. (External VD remains input during this time.)
INTSW
input
EXT-VD
input
RESET
output
LL
INT/LL
Change signal
INT
output
Fig 12.2-19 Timing for switch from INT to LL based on INTSW input
Detect point
Don't Care
Detect
point
Not Detect
208
No pulse
500ns Over
Don't Care
500ns Over
Don't Care
Don't Care
- SS-HQ1 Application Notes -
Ver.1.0.0 January 7, 2005
Don't Care