TA1370FG_05 Datasheet, PDF (26/42 Pages) Toshiba Semiconductor – SYNC Processor, Frequency Counter IC for TV Component Signals

Note
Item
HA02 HD3 input horizontal sync phase
TA1370FG
SW Mode
Test Conditions and Measuring Method (V_CC = 9 V, Ta = 25 ± 3°C, unless otherwise specified)
S07 S23 S24 S26
c
b
⎯
⎯ (1) Set sub-address (00) 40 and (02) 02.
(2) Input signal b (horizontal 31.5 kHz) to pin 14 (HD3-IN).
(3) Measure the phase difference HD_3PH between pin 14 and pin 7 (AFC filter) wave form.
Signal b
31.75 µs
2.35 µs
1.5 V
Pin 7 wave form
HD_3PH
HA03 Polarity distinction active range
c
b
⎯
⎯ (1) Set sub-address (00) 40 and (02) 02.
(2) Input signal b ((horizontal 31.5 kHz) to pin 14 (HD3-IN).
(3) Decreasing the duty of signal b to 0% (get negative period shorter), measure the duty of Signal b
(HD-DUTY1) when the phase between pin 14 and pin 16 (HD1-OUT) change.
(4) Increasing the duty of Signal b to 100% (get negative period longer), measure the duty of Signal b
(HD-DUTY2) when the phase between pin 14 and pin 16 (HD1OUT) change.
Signal b
31.75 µs
2.35 µs
1.5 V
A
B
* duty = A/(A + B) × 100 (%)
26
2005-09-05