TC9328AF datasheet(8/84 Pages) TOSHIBA

8 / 84 page

TC9328AF

2004-09-13

Pin No.

Symbol

Pin Name

Function and Operation

Remarks

IFin1/IN1

IFin2/IN2

IF signal input

/Input port

IF signal input pin for the IF counter to

count the IF signals of the FM and AM

bands and to detect the automatic stop

position.

The input frequency is between 0.3 to

12 MHz. A built-in input amp. and C

coupling allow operation at low-level

input.

The IF counter is a 20-bit counter with

optional gate times of 1, 4, 16 and 64

ms. 20 bits of data can be readily

stored in memory. In Manual mode,

gate On/Off can be performed using

instruction.

The input pin can be programmed for

use as an input port (IN port).

Note: When a pin is set to IF input, the

input is at high impedance in PLL

Off mode or if the pins are not

used for input.

31, 50

VDD

47, 73

GND

Power-supply pins

Pins to which power is applied.

Normally, VDD = 0.9~1.8 V is applied.

For the PLL, power for the prescaller in

the programmable counter block and IF

input amp can be individually

programmed. By switching to different

modes depending on the power supply

voltage and the frequency used, current

dissipation can be lowered.

Connect a stabilizing capacitor between

the VDD pin and GND (4.7 µF, 0.01 µF

typ.).

In backup state (at execution of the

CKSTP instruction), current dissipation

drops (1

µA or less) and the power

supply voltage can be reduced to 0.75

If more than 0.9 V is applied when the

pin voltage is 0, the device system is

reset and the program starts from

address “0”. (Power on reset)

Note: To operate the power on reset,

the power supply should start up

in 10~100 ms.

Note: The power-on reset function can

be enabled/disabled using the AI

switch.

VDD

RfIN2

GND

VDD

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