S1A0903X01-Q0R0 Samsung Electronics, S1A0903X01-Q0R0 Datasheet - Page 29

• Manufacturer Part Number: S1A0903X01-Q0R0
• Description: AM/FM 1 Chip Tuner with PLL
• Manufacturer: Samsung Electronics

AM/FM 1CHIP TUNER WITH PLL
LOCKED STATE DETECTION TIMING
UL[1:0]
Getting LOCK State
LOCK bit in serial data reflects LOCK state regardless of DOC[1:0]
DO pin reflects LOCK state only when DOC[1:0] is 2
0
1
2
3
LOCK : DO pin = open , UNLOCK : DO pin = low
hold the previous state
timing
when
E is out directly depending on SIO
LOCK state in serial data
E is narrower than
L.P.F
VCO
Figure 13. Lock Detection Scheme
N(16)
R(4)
E width more than 2ms, set LOCK
1/R
1/N
preset
E is out directly
Fr
Fc
LOCK state on DO pin
Frequency
Detector
Detector
Phase
Lock
Lock
Error
Remarks
S1A0903X01
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