Silan

Semiconductors

SC9256

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

REV: 1.0

2002.01.30.

21

Other Control Bits

1.

CLK and C5 bits…Control bits which switch the function for the OT-4/DO2 pin.

The O4C bit controls switching of the DO2 pin and OT-4 pin.

When bits R0~R3 of the input register (D0H) are set to “1” (standby mode).

LSB

MSB

Address D2H

O4C

XT

O4C

XT

00

1

0

10

11

DO2/OT-4 PIN STATE

DO2 output

OT-4 output

CRYSTAL OSCILLATOR

CIRCUIT STATE

Oscillator circuit on

Oscillator circuit off

Oscillator circuit off

Oscillator circuit on

When one of bit R0~R3 of the input register (D0H) is set to “0” (not standby mode)

LSB

MSB

Address D2H

O4C

XT

O4C

XT

00

1

0

10

11

DO2/OT-4 PIN STATE

DO2 output

OT-4 output

CRYSTAL OSCILLATOR

CIRCUIT STATE

Oscillator circuit on

2.

DOHZ bit…controls the DO2 pin output state.

LSB

MSB

Address D2H

DOHZ

0

1

phase comparison error output

DO2 output fixed at high impedance

3.

TEST bit… Data should normally be set to “0”.

LSB

MSB

Address D2H

TEST

"0"