Hitachi HTA-7000 - Description of Controller

HITACHI HTA-7000
DESCRIPTION OF CONTROLLER IC5S02(piPD1 703C-011)
1. Controller 1C502 (4PD1703C-01 1) pin function table
Pin
No.
|
Symbol
,
Name
|
Content
(details)
: E01, , Error Out These are the charge pump outputs of the phase detector which composes the
| E02 PLL.
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Chip i This is the terminal to determine whether or not to set the controller to
Enable Enable. It is set to Enable at high level.
1 —
Prescaler This is the output terminal of select signal which determins the prescaler
| Control division rate in the pulse swallow system.
| X’tal OSC. These are the connecting terminals of the 4.5 MHz crystal oscillator.
Station This is the input terminal of sweep stop signal during Auto-tuning (Auto
| Detector Up/Down).
Muting This is the muting output terminal during FM/AM band selection, Auto/
| Output | Manual tuning and Press memory re-call.
i | This is active high.
; Pl— PS Digit These are the output terminals of digit signals for display and are active low.
1
| Outputs
Vpp This is the power terminal of the controller.
| Sa — Sg i Segment | These are display segment output/key return signal source terminal, and are
| Outputs active high.
KO ~ K3 Key Return | There are input terminals of the return signal output from the key matrix.
Signal !
: Input
FM Local This is the terminal to input the output signal which has been produced dividing
i Oscillator | the FM local oscillation output by 16 and 17, with prescaler uPBS53AC.
|
'
This is the GND terminal of the controller.
This is the terminal to input the AM local oscillation output.
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Controller IC502 pin diagram cE EOt
(Top View) KBRND9876 54321
SLT BPDARBASETA
So Se Sc Ss K2 «KO GNO
K1 FM
St Sd S> K3
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2. Key matrix composition
K3 K2 Kl KO Type of switch
Sa MEMORY UP DOWN
Momentary switch
Sb Pi P2 P3 P4
Se PS P6 |
Sd
7 f Alternate switch
|
Se AM/FM ee 108/104 | (108/104 excluded)
—+ ;
Sf U.S.A. AM 10K/9k | Initial setting switch
H Band 0 (108/104 included)
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HITACHI HTA-7000
3. Description of key matrix
3-1. Initial setting switch
Description of function
3-2 Alternate switch
Symbol
BAND 1 This is the switch for setting reception band.
BAND 0 Either U.S. or Europe bands can be selected.
, BAND 1 | BAND 0 BAND AREA ]
i ON “tT OFF U.S. Band ........... for U.S.A. Canada
: OFF ‘ ON Europe Band ...... except for U.S.A. Canada
U.S.A. AM This switch selects the AM channel space and the PLL reference frequency in the U.S. band
10K/9K (Not concerned with Europe band).
ON ..... 10KHz OFF ..... 9KHz |
108/104 This switch sets the FM max. frequency in the Europe band.
87.50 - 108.00 MHz
87.50 - 104.00 MHz
Description of function
3-3 Instantaneous switch
AUTO
(FM only)
MANUAL
AM/FM AM/FM band selector switch.
ON ..... AM band OFF ..... FM band
AUTO/MANUAL Auto/Manual tuning select switch.
Auto up When the UP key is depressed, Sweep-up continues at approx. 80 ms interval
tuning in the sawtooth wave mode.
Manualup | Everytime the UP key is depressed, the frequency increases by one steps of
' tuning channel spacing frequency. With the UP key is kept depressed for more than 0.5
ON ..... Auto tuning
OFF ... Manual tuning
Description of function
Sweep-up stops when a station is detected.
| sec., Sweep-up continues at intervals of approx. 80 ms until the key is released.
DOWN AUTO
Auto down | Same as Auto up tuning except Sweep down.
(FM only) | tuning
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MANUAL | Manual Same as Manual up tuning except Sweep down.
| down
| | tuning
Pl— P6 Preset This is the preset memory WRITE or RECALL key.
memory This memory is for both AM/FM independently with one button.
{Siebert
MEMORY Memory When this key is depressed, the memory write indicator lights and it is now
write possible to write data into the memory. The address is designated with the (P1)
through (P6) keys and the operation is completed. Details on thé operations are
given below.
(a) Unless any of the (P1) through (P6) keys is depressed within about 5
seconds, the memory write is automatically reset after about 5 seconds and
the memory write indicator goes off.
If one of the (P]) through (P6) keys is depressed within about 5 seconds. the
PLL data is stored in the corresponding address. At the same time. the
memory write is reset, the memory write indicator goes off and the station
indicator lights.
(b
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