ICS9248-135 Datasheet, PDF(5/15 Page) Integrated Circuit Systems – Frequency Generator & Integrated Buffers for Celeron & PII/III™& K6

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

ICS9248-135 Datasheet, PDF (5/15 Pages) Integrated Circuit Systems – Frequency Generator & Integrated Buffers for Celeron & PII/III™& K6

◁

ICS9248-135

Byte 1: CPU, Active/Inactive Register

(1= enable, 0 = disable)

BIT

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

PIN#

PWD

DESCRIPTION

SEL24_48#

1 (48MHz when set to 0)

(24MHz when set to 1)

1 Reserved

1 CPUCLK2 (Act/Inact)

1 CPUCLK1 (Act/Inact)

1 CPUCLK0 (Act/Inact)

1 Reserved

Byte 2: PCI, Active/Inactive Register

(1= enable, 0 = disable)

BIT

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

PIN#

PWD

DESCRIPTION

1 (CPU2.5_3.3#)

1 PCICLK6 (Act/Inact)

1 PCICLK5 (Act/Inact)

1 PCICLK4 (Act/Inact)

1 PCICLK3 (Act/Inact)

1 PCICLK2 (Act/Inact)

1 PCICLK1 (Act/Inact)

1 PCICLK_F (Act/Inact)

Byte 3: SDRAM, Active/Inactive Register

(1= enable, 0 = disable)

BIT

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

PIN#

PWD

DESCRIPTION

1 SDRAM3 (Act/Inact)

1 SDRAM2 (Act/Inact)

1 SDRAM1 (Act/Inact)

1 SDRAM0 (Act/Inact)

1 Reserved

Byte 4: Reserved , Active/Inactive Register

(1= enable, 0 = disable)

BIT

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

PIN#

PWD

DESCRIPTION

1 24_48MHz

1 48MHz

1 SDRAM_F1

1 SDRAM_F0

1 SDRAM7

1 SDRAM6

1 SDRAM5

1 SDRAM4

Byte 5: Peripheral , Active/Inactive Register

(1= enable, 0 = disable)

BIT

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

PIN#

PWD

DESCRIPTION

1 Reserved

1 FS3#

1 FS2#

1 FS1#

1 FS0#

1 REF1 (Act/Inact)

1 REF0 (Act/Inact)

Notes:

1. Inactive means outputs are held LOW and are disabled

from switching.

2. Latched Frequency Selects (FS#) will be inverted logic

load of the input frequency select pin conditions.

Byte 6: Peripheral , Active/Inactive Register

(1= enable, 0 = disable)

BIT PIN# PWD

DESCRIPTION

Bit7 -

0 Reserved (Note)

Bit6 -

0 Reserved (Note)

Bit5 -

0 Reserved (Note)

Bit4 -

0 Reserved (Note)

Bit3 -

0 Reserved (Note)

Bit2 -

1 Reserved (Note)

Bit1 -

1 Reserved (Note)

Bit0 -

0 Reserved (Note)

Note: Donât write into this register, writing into this register

can cause malfunction

Third party brands and names are the property of their respective owners.

▷