IMIC9531CT(2003) データシートの表示（PDF） - Cypress Semiconductor

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IMIC9531CT
(Rev.:2003)

PCIX I/O System Clock Generator with EMI Control Features

Cypress Semiconductor 

C9531

Byte 0: Output Register (continued)

2

0

1

0

0

1

HWSEL

Not used

Not used

Hardware/SMBus frequency control. 1 = Hardware (pins 6, 7, and 15), 0 = SMBus

Byte 0 bits 3, 4, & 6

Table 4. Clarification Table for Byte0, bit 5

Byte0, bit6

0

0

Byte0, bit5

0

1

Description

Frequency generated from second PLL

Frequency generated from XIN

1

0

Spread @ –1.0%

1

1

Spread @ –0.5%

Table 5. Test Table

Test Function Clock

Frequency

CLK

XIN/4

Outputs

REF

XIN

Note

XIN is the frequency of the clock that is present on the

XIN input during test mode.

Byte 1: CPU Register

Bit

@Pup

7

1

6

1

5

1

4

1

3

1

2

1

1

1

0

1

Name

REFEN

Reserved

Reserved

REF Output Enable

0 = Disable, 1= Enable

Reserved

Reserved

Reserved

Reserved

Reserved

Description

Byte 2: PCI Register

Bit

@Pup

7

1

6

1

5

1

4

1

3

1

2

1

1

1

0

1

Name

18

19

22

23

24

Reserved

Reserved

Reserved

CLK4 Output Enable

0 = Disable, 1= Enable

CLK3 Output Enable

0 = Disable, 1= Enable

CLK2Output Enable

0 = Disable, 1= Enable

CLK1 Output Enable

0 = Disable, 1= Enable

CLK0 Output Enable

0 = Disable, 1= Enable

Description

Document #: 38-07034 Rev. *D

Page 4 of 10

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