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参数资料
| 型号： | LC7232-8291 |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封装： | QIP-80 |
| 文件页数： | 8/33页 |
| 文件大小： | 514K |
| 代理商： | LC7232-8291 |
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LC7232-8291
No.3673–16/33
(4) UP and DOWN
These keys are used for manual tuning. If they are pressed once, the current frequency value can be decreased
(DOWN) or increased (UP) one step. If they are pressed continuously for more than 500ms, the value will change at
a step of about 70ms. The system will enter a wait state of about 500ms when the frequency value has reached a band
edge.
In the VF mode, they can be used as the SEEK UP, DOWN keys.
These functions are effective only when the HOLD signal (active low) becomes inactive or at the POWER on.
(5) SEEK UP and SEEK DOWN
These keys are used for automatic station searching. If the desired station is searched, its frequency is held. If the
SCAN key is pressed during the seek operation, the SCAN mode will be activated. This means that if the SEEK UP
key is pressed during the SEEK DOWN operation, the scan operation in the UPward direction is started. If the SEEK
DOWN key is pressed during the SEEK UP operation, the scan operation in the DOWNward direction is started as
well.
If these keys are pressed twice in a row, the SEARCH mode will be released. The system will enter a wait state of
about 500ms when the search operation has reached a band edge. The search speed is 50ms/step for FM, or 70ms/
step for AM.
These functions are effective only when the HOLD signal (active low) becomes inactive or at the POWER on.
(6) SCAN
This key is used for automatic station searching. If the desired station is searched, its frequency is held for 5 seconds
(AMUTE (active low)=‘H’). If the key is pressed again during this 5-second period, the frequency is officially held.
If no action is taken during that 5-second period, the system will continue the search operation. If the SEEK DOWN
key is pressed during the scan operation, the seek operation in the DOWNward direction will be started. If this key is
pressed twice in a row, the SCAN mode will be released. The system will enter a wait state of about 500ms if the
search operation has reached a band edge. The search speed is 50ms/step for FM, or 70ms/step for AM.
This key is effective only when the HOLD signal (active low) becomes inactive or at the POWER on.
(7) BAND
This key is used to select the desired frequency band. The current band value will be changed every time when this
key is pressed.
This key is effective only when the HOLD signal (active low) becomes inactive or at the POWER on.
(8) VF
This key is used to activate the VF mode for FM band. It can be used in any band under the RADIO mode.
When this key is pressed, the ‘VF’ display will be turned on and the VFOUT output will change to ‘H’. In this
situation, the SD signal will be checked 300ms later. In addition, the SKIN signal (active low) will be checked 250ms
(750ms if bands are changed) later. If the SKIN signal is active, the frequency is held. If it is inactive (‘H’), the
system will start auto search operation for the SK station, and then keep a frequency at the moment when the SKIN
signal (active low) becomes active.
The SK display in the Europe and FM modes is turned on when the SKIN signal (active low) becomes active. It has
nothing to do with the VF function.
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