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參數(shù)資料
| 型號： | UPD1723GF-213 |
| 廠商： | NEC Corp. |
| 英文描述： | PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LF TUNER CAR AUDIO |
| 中文描述： | 鎖相環(huán)頻率合成器和控制器的調(diào)頻/中波/低頻調(diào)諧器汽車音響 |
| 文件頁數(shù)： | 63/80頁 |
| 文件大?。?/td> | 1590K |
| 代理商： | UPD1723GF-213 |
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63
μ
PD1723GF-013,
μ
PD1723GF-213
4.
RADIO MUTE OUTPUT TIMING (RDMUTE)
Key ON chattering prevention
Premuting and BEEP output
Division ratio setting and display contents updating
Postmuting
Scan time
PLL lock wait time
4.1
RADIO MUTE (RDMUTE PIN) OUTPUT TIMING CHARTS
(1) Manual up/down
(i)
1 channel up/down
(a) AUTO500 switch = 0
40 ms
Key ON
125 to 250 ms
50 ms
5 to
15 ms
(b) AUTO500 switch = 1
40 ms
Key ON
125 to 250 ms
Within 500
to 625 msec.
5 to
15 ms
Key OFF
50 ms
At the band edge (between lowest frequency and highest frequency) of both (a) and (b), time
is
625 to 750 ms.
(ii) Continuous up/down
(a) AUTO500 switch = 0
At the band edge, time
becomes 540 to 665 ms and time
becomes 625 to 750 ms.
(b) When AUTO500 switch = 1, continuous up/down is not performed because holding down the key
for more than 0.5 seconds sets autotuning.
Key ON
Key OFF
50 ms
5 to
15 ms
40 ms
500 to 625 ms
5 to
15 ms
40 ms
40 ms
125 to 250 ms
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