LC89057W-VF4A-E SANYO [Sanyo Semicon Device], LC89057W-VF4A-E Datasheet - Page 19

• Manufacturer Part Number: LC89057W-VF4A-E
• Description: Digital Audio Interface Transceiver
• Manufacturer: SANYO [Sanyo Semicon Device]

10.1.9 Output of Clock switch transition signal (
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CKST outputs "L" pulse when the output clock changes by PLL lock/unlock.
In the lock-in stage, the
following detection of input data, and rises at the same timing as RERR after a designated period.
In the unlock stage, the
word clocks generated from the XIN clock are counted for a designated period.
Change of the PLL lock status and timing of the clock change can be seen by detecting the rising and falling edges of
the
CKST "L" pulse.
__________
RX0 to RX6
RX0 to RX6
XTAL clock
XTAL clock
PLL status
VCO clock
PLL status
VCO clock
RMCK
RMCK
RERR
RERR
CKST
CKST
CKST "L" pulse falls at the same timing as RERR, PLL lock detection signal, and rises after
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CKST "L" pulse falls at the word clock generated from the XIN clock after PLL is locked
__________
Digital data
UNLOCK
UNLOCK
Figure 10.4 Clock Switch Timing
LC89057W-VF4A-E
(a): Lock-in stage
(b): Unlock stage
Digital data
____________
CKST )
Same timing as RERR
After PLL lock
UNLOCK
LOCK
Same timing as RERR
45ms to 300ms
0.6ms to 6.4ms
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