Toshiba TC9349AFG Manual page 10

PIN No. Symbol Pin Name
IF signal input
49 IFin/IN
50 VPLL
Power supply pin
52 GND (PLL)
Local oscillation signal
51 OSCin
Function and Operation
IF signal input pin.
The input frequency is between 0.03 and
12 MHz. A built-in input amp and C
coupling allow small-amplitude operation.
The IF counter can store 20-bit data in
memory. In Manual mode, gate On/Off
control can be performed using an
instruction.
The input pin is used as an input port (IN
/Input port
port). In this case, the pin is for CMOS
input, so that input clocks can be counted
using the IF counter.
Note: When a pin is set to IF input, the
input is at high impedance in
PLL-off mode.
Note: Since the V
in this circuit, an input state cannot
be read when the V
supply is in the OFF state.
Pin to which power is applied for the PLL
prescaler.
Normally, the supply voltage to be applied
PLL is from 0.9 to 1.8 V.
Current dissipation becomes low in PLL-off
mode.
Usually, the pin is connected to the VDD
Programmable counter input pin.
It is possible to select the pulse-swallow
type (HF mode) or the direct divide type
(LF mode) through programming.
The local oscillation output of 1 to 30 MHz
is input in the HF mode; 0.5 to 4 MHz in
input
the LF mode.
A built-in input amp and C coupling allow
small-amplitude operation.
Note: The input is at high impedance in
PLL-off mode.
10
power supply is used
PLL
power
PLL
TC9349AFG
Remarks
R
fin2
V
PLL
V
PLL
Input instruction
V
PLL
R
fin1
V
PLL
2006-02-24