Onkyo TX-7920 - IC Block Diagram: LM7001; LM7001 Terminal Description

TX-7900/TX-7920
IC BLOCK DIAGRAM AND DESCRIPTION
LM7001(PLL synthesizer and controller)
Phase Detector
Charge Pump
. Divider =]
- | Shift Register Latch aoe Latch
31
CE te athe
~10—
Pin No. | Terminal Description
1 XOUT
Connect to the 7.2 MHz crystal oscillator.
3 CE Chip enable terminal. Connect to the PLL terminal of micro processor.
4 CL Serial clock input terminal. Connect to the CLOCK terminal of micro processor.
5 DATA | Serial data input terminal. Connect to the DATA terminal of micro processor.
6 SYN Not used.
é [ 7 AUTO/MONO| Auto/Mono control output terminal. “H” when Auto.
8
BO2
FM
control
signal
output
terminal.
““L”
when
FM.
1
L 9 | BO3 | AM control signal output terminal. ““L” when AM.
10 AMIN AM local oscillator input terminal.
11
FMIN
|
FM
local
oscillator
terminal.
7
L 12 Vop 1 | Power supply terminal for back-up.
13 Vopp2 Power supply terminal.
14
PD1
Charge
pump
output
of
the
phase
detector
which
constitutes
the
PLL.
High
level
is
output
when
sl
divided
local
oscillator
frequency
is
high
than the
reference
frequency.
15
PD2
In
the
opposite
case,
low
level
is
output.
Floating
occurs
when
the
frequencies
matched.
The
output
is
applied
to
the
variable
capacitor
diode
in
the
local
oscillator
through
the
low
pass
| filters.
16 Vss Ground terminal.