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©2020 Renesas Electronics Corporation

February 19, 2020

9SQL4952/9SQL4954/9SQL4958 Datasheet

1 See BCLK Low-Power HCSL Outputs table for slew rates.

1 The disabled state depends on Byte11[1:0]. '00' = Low, '01'= HiZ, '10' = Low, '11' = High.

Byte 4 is Reserved

Table 23. Byte 2: BCLK Slew Selection Register

Byte 2

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Control

Function

Select fast or

slow slew rate

Select fast or

slow slew rate

Select fast or

slow slew rate

Select fast or

slow slew rate

Select fast or

slow slew rate

Select fast or

slow slew rate

Select fast or

slow slew rate

Select fast or

slow slew rate

Type

RW

RW

RW

RW

RW

RW

RW

RW

0

Slow Slew Rate

1

Fast Setting

9SQL4958

Name

BCLK7_slew

BCLK6_slew

BCLK5_slew

BCLK4_slew

BCLK3_slew

BCLK2_slew

BCLK1_slew

BCLK0_slew

9SQL4958

Default

1

111

1111

9SQL4954

Name

Reserved

Reserved

Reserved

Reserved

BCLK3_slew

BCLK2_slew

BCLK1_slew

BCLK0_slew

9SQL4954

Default

x

x

x

x

1111

9SQL4952

Name

Reserved

Reserved

Reserved

Reserved

Reserved

BCLK1_slew

BCLK0_slew

Reserved

9SQL4952

Default

xxx

xx

1

1

x

Table 24. Byte 3: REF Slew Rate Control Register

Byte 3

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Control

Function

Slew Rate Control

Wake-on-Lan

Enable for REF

REF Output

Enable

Reserved

Reserved

Reserved

Reserved

Type

RW

RW

RW

RW

0

00 = Slowest

10 = Fast

REF disabled

in Power Down

Disabled1

1

01 = Slow

11 = Fastest

REF runs in

Power Down

Enabled

Name

REF Slew Rate [1:0]

REF Power

Down Function

REF OE

Default

0

101

x

x

x

x