LC72347W 查看數據表（PDF） - SANYO -> Panasonic

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LC72347W

Ultralow-Voltage ETR Controller with On-Chip LCD Driver

SANYO -> Panasonic 

LC72346W, 72347W

Continued from preceding page.

Pin No.

Pin

I/O

Function

57

RES

System reset input.

I In CPU operating mode or halt mode, applications must apply a low level for at least

one full machine cycle to reset the system and restart execution with the PC set to

location 0. This pin is connected in parallel with the internal power on reset circuit.

Output for the 3 V step-up circuit clock. Outputs 1/2 the AM local oscillator frequency

31

VDC1

O in AM reception mode, and 1/256 the FM local oscillator or 75 kHz in FM reception

mode.

30

VDC3

Voltage stepped up by the DC-DC converter (3 V)

I

May also be used to input an equivalent voltage.

29

VDDRAM

I RAM backup power supply. Connected to the VDC3 voltage through a diode.

32

VADJ

O

VDC3 voltage adjustment pin. Insert a 10 kΩ trimmer between this pin and ground to

adjust the VDC3 voltage.

59

FMIN

FM VCO (local oscillator) input.

This pin is selected with the PLL instruction CW1.

I

The input must be capacitor coupled.

Input is disabled in backup mode, in halt mode, after a reset, and in PLL stop mode.

I/O circuit

CMOS amplifier input

60

AMIN

AM VCO (local oscillator) input.

This pin and the bandwidth are selected with the PLL instruction CW1.

CW1 b1, b0

Input pins

Bandwidth

I

10

AMIN (H)

2 to 20 MHz (SW)

11

FMIN (L)

0.5 to 10 MHz (MW, LW)

The input must be capacitor coupled.

Input is disabled in backup mode, in halt mode, after a reset, and in PLL stop mode.

CMOS amplifier input

CMOS push-pull

Main charge pump output. When the local oscillator frequency divided by N is higher

than the reference frequency a high level is output, when lower, a low level is

62

EO

O output,and the pin is set to the high-impedance state when the frequencies match.

This output goes to the high-impedance state in backup mode, in halt mode, after a

reset, and in PLL stop mode.

61

VSS

Power supply pin. This pin must be connected to ground.

28

VSS

—

This pin must be connected to ground.

—

58

VDD

This pin must be connected to VDD. Supports A/D converter.

Note*: When a pin in an I/O switching port is used as an output, applications must first set up the data with an OUT, SPB, or RPB instruction and then set up

output mode with an IOS instruction.

No. 6651-9/12

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