CXD2510Q
In addition, a MAX timer is built in as a countermeasure against abnormal operation due to external
disturbances, etc. When the auto sequence command is sent from the CPU, this command assumes a $4XY
format, in which X specifies the command and Y sets the MAX timer value and timer range. If the executed
auto sequence command does not terminate within the set timer value, the auto sequence is interrupted (like
$40). See §1-2, $4X commands concerning the timer value and range. Also, the MAX timer is invalidated by
inputting $4X0.
Although this command is explained in the format of $4X in the following command descriptions, the timer
value and timer range are actually sent together from the CPU.
(a) Auto focus ($47)
Focus search up is performed, FOK and FZC are checked, and the focus servo is turned on.
If $47 is received from the CPU, the focus servo is turned on according to Fig. 3-8. The auto focus is
executed after focus search up, and the pickup should be lowered beforehand (focus search down). In
addition, blind E of register 5 is used to eliminate FZC chattering. In other words, the focus servo is turned
on at the falling edge of FZC after FZC has been continuously high for a longer time than E.
Connection diagram for using the auto sequencer (example)
RF
MIRR
FOK
MIRR
FOK
DATA
CLOK
XLAT
SENS
CXD2510Q
Micro-computer
C. out
SENS
DATA
CLK
CNIN
SEIN
SSP
DATO
CLKO
XLTO
XLT
Fig. 3-7.
– 38 –
SONY [ SONY CORPORATION ]
