Sharp QT-MP5W Service Manual page 47

QT-MP5W
IC102 92L31007213100 LC72131M ( AM/FM PLL Frequency synthesizer ) ( 3/4 )
PIN DESCRIPTION
Pin No.
Symbol (MFP pin Nos. are
in parentheses.)
XIN 1 (1)
XOUT 22 (20)
FMIN 16 (14)
AMIN 15 (13)
CE 3 (2)
CL 5 (4)
DI 4 (3)
DO 6 (5)
V 17 (15)
DD
V 21 (19)
SS
Type
Xtal OSC • Crystal resonator connection (4.5/7.2 MHz)
• FMIN is selected when the serial data input DVS bit is set to 1.
• The input frequency range is from 10 to 160 MHz.
• The input signal passes through the internal divide-by-two
Local oscilator
prescaler and is input to the swallow counter.
signal input
• The divisor can be in the range 275 to 65535. However, since
the signal has passed through the divide-by-two prescaler, the
actual divisor is twice the set value.
• AMIN is selected when the serial data input DVS bit is set to 0.
• When the serial data input SNS is set to 1:
– The input frequency range is 2 to 40 MHz.
– The signal is directly input to the swallow counter.
– The divisor can be in the range 272 to 65535, and the divi-
Local oscilator
sior used will be the value set.
signal input
• When the serial data input SNS bit is set to 0:
– The input frequency range is 0.5 to 10 MHz.
– The signal is directly input to a 12-bit programmable divider.
– The divisor can be in the range 4 to 4095, and the divisor
used will be the value set.
• Set this pin high when inputing (DI) or outputting (DO) serial
Chip enable
data.
• Used as the synchronization clock when inputting (DI) or out-
Clock
putting (DO) serial data.
• Inputs serial data transferred from the controller to the
Data input
LC72131.
• Outputs serial data transferred from the LC72131 to the con-
troller.
Data output
The content of the output data is determined by the serial data
DOC0 to DOC2.
• The LC72131 power supply pin (V
Power supply • The power on reset circuit operates when power is first
applied.
Ground • The LC72131 ground.
Functions
= 4.5 to 5.5 V).
DD
7 – 3
Circuit
configuration
A02598
A02599
A02599
S
A02500
S
A02500
S
A02500
A02601
–
–