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KRC-646D/I
CIRCUIT DESCRIPTION
and the channel spacing:
Diode Matrix for Initialization
The diode matrix for initialization has the following five
BANDA
status. All status is read out only when the power is sup-
(2) Clock signal select switch:
plied to the Vpp for the first time (Power-ON, Reset) and
CLKSEL
when the CE pin goes high from low level (CE Reset), in
:
;
<8.
3)
Priority
selec
i
isplay:
another periods, the diode matrix status is ignored.
(3)
ee
Powe fordisplay
PRIORITY
(4) —
(5) NR select switch:
NR SEL
(6) CLOCK/FREQUENCY select switch:
CLOCK/FRO
(7) LW select switch:
Function Description
Frequency Range
Channel Spacing
Manual Step
87.9~107.9 MHz
200 kHz
_
530~ 1620 kHz
10 kHz
_
87.5~108.0 MHz
50 kHz
522~1611
kHz
9 kHz
When the clock function is provided, this switch selects the priority mode for display.
"1. No priority
"O": Priority is provided.
Select switch to provide the clock function or not.
CLKSEL
"1: Clock is not provided (For back-up, RAM is not cleared)
"O": Clock is provided.
Select switch to provide the NR (noise reduction) function.
"O": NR is not provided (WIDE-ADV and BAND 2 output pin)
"1" NR provided
Switch to access the preset memory (M1 to M6) sequentially
"0": M1 to M6 keys are preset independently
"1: Each time the M1 key is pressed, preset memory is sent sequentially
(Mi Mey
15
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