LC7234-8460 데이터 시트보기 (PDF) - SANYO -> Panasonic
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LC7234-8460 Datasheet PDF : 23 Pages
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LC7234-8460
Segment output
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
Common driver output
COM1
COM2
kHz
MW
SW1· dp1· MHz
FM· dp2· MHz
1a
LW
1c
1b
2f
2a
2b
2g
2e
2c
2d
STEREO
3f
3a
3b
3g
3e
3c
3d
COLON
Segment output
S13
S14
S15
S16
S17
S18
S19
S20
S21
S22
S23
Common driver output
COM1
COM2
4f
4a
4b
4g
4e
4c
4d
TIMER
ON
OFF
5
AM
7f
7a
7b
7g
7e
7c
7d
SLEEP
6b, c
PM
Hold Mode
When the clock is enabled and HOLD makes a HIGH-to-
LOW transition, the FMOSC, AMOSC, IFIN and TEST
inputs are disabled and only the clock operates. In this
mode, the supply current is reduced to 0.7 mA (typ).
Backup Mode
When the clock is disabled and HOLD makes a HIGH-
to-LOW transition, the FMOSC, AMOSC, IFIN and
TEST inputs are disabled and the 4.5MHz crystal
oscillator is halted. In this mode, the supply current is
reduced to 5 µA (max).
As AMUTE becomes high impedance in backup mode, a
pull-down resistor should be connected between AMUTE
and ground.
Key Functions
Frequency display
PSCH2 and PSCH1 = LOW
Write mode
When ME is pressed, the flashing preset number ‘P’
appears and the system enters write mode for 5 seconds.
If one of the preset memory keys CH1 to CH8 is pressed
within 5 seconds, the presently selected frequency and
status are written to the corresponding channel.
If ME is pressed while ‘P’ is displayed, write mode is
extended.
When the same preset memory key is pressed twice,
AMUTE goes HIGH.
If any other key is pressed or if HOLD makes a HIGH-
to-LOW transition, write mode is canceled.
Read mode
When one of the preset memory keys CH1 to CH8 is
pressed, the corresponding frequency and status are
displayed.
PSCH2 = LOW and PSCH1 = HIGH
Write mode
When ME is pressed, the flashing preset number ‘P’
appears and the system enters write mode for 5 seconds.
If one of the preset memory keys CH1 to CH5 is pressed
within 5 seconds, the presently selected frequency and
status are written to the corresponding channel.
If ME is pressed while ‘P’ is displayed, write mode is
extended. When the same preset memory key is pressed
twice, AMUTE goes HIGH.
If any other key is pressed or if HOLD makes a HIGH-
to-LOW transition, write mode is canceled.
Read mode
When one of the preset memory keys CH1 to CH5 is
pressed, the corresponding frequency and status are
displayed.
PSCH2 = HIGH and PSCH1 = LOW
Write mode
When ME is pressed, a flashing ‘P1’ appears in the
frequency display area and the system enters write mode
for 5 seconds.
If one of the preset memory keys CH1 to CH8 is pressed
within 5 seconds, the frequency and status are written to
the corresponding channel of channels 1 to 8.
When the FM band is selected, pressing ME while ‘P1’ is
flashing changes the display to a flashing ‘P2’. If one of
the preset memory keys CH1 to CH8 is then pressed
within 5 seconds, the frequency and status are written to
the corresponding channel of channels 9 to 16.
If ME is pressed while ‘P2’ is flashing, write mode is
canceled.
When the AM band is selected, pressing ME while ‘P1’ is
flashing cancels the write mode.
Read mode
When the FM band is selected and one of the preset
memory keys CH1 to CH8 is pressed once, the frequency
and status are read from the corresponding channel of
channels 1 to 8.
If one of the preset memory keys is pressed twice, the
frequency and status are read from the corresponding
channel of channels 9 to 16.
When the AM band is selected and one of the preset
memory keys CH1 to CH8 is pressed, the corresponding
frequency is read out.
No.4350–8/23
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