TC9328AF datasheet(73/84 Pages) TOSHIBA

73 / 84 page

TC9328AF

2004-09-13

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MUTE Output

This is a 1-bit CMOS output port for muting control purposes.

MUTE Port

This port is accessed with the OUT1/IN1 instruction for which [CN = 8H] has been specified in the

operand. MUTE output is used for muting control. Setting the MUTE bit to “1” suppresses the generation

of noise when the linear circuit is switched, for example when the equipment is powered down, or when the

I/O Port 1 input or HOLD input is used to switch band. This control is set up according to the contents of

I/O bit and HOLD bit. POL bit sets up the logic of MUTE output.

Please set up according to specification.

Circuit Configuration of MUTE Output

φL/K18

MUTE

I/O

POL

HOLD

0: Even if HOLD input status changes, MUTE output does not change.

1: By changing HOLD input status, MUTE bit is set to “1”.

Control by change of HOLD input state changing

0: Positive logic: MUTE bit output without modification

1: Negative logic: MUTE bit inversed and output

MUTE output polarity control

0: Even if I/O port -1 status changes, MUTE output doesn’t change.

1: By changing I/O port -1 status, MUTE bit is set to “1”.

Control selection by changes in the I/O port-1input status

0: MUTE output set at “L” level during positive logic and “H” level during negative logic.

1: MUTE output set at “H” level during positive logic and “L” level during negative logic.

MUTE output setting

I/O bit

The signal of input change of I/O Port -1

HOLD bit

The signal of HOLD input pin changing

POL bit

MUTE

Reset signal

MUTE bit

TC9328AF Datasheet(PDF) 73 Page - Toshiba Semiconductor