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©2020 Renesas Electronics Corporation

February 19, 2020

9SQL4952/9SQL4954/9SQL4958 Datasheet

1 A low on these bits will override the OE# pin and force the differential output to the state indicated by B11[1:0] (Low/Low default)

1 See notes on Spread Selection table. B1[5] must be set to a 1 in order to use B1[4:3].

Table 21. Byte 0: Output Enable Register

Byte 01

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Control

Function

Output Enable Output Enable Output Enable Output Enable Output Enable Output Enable Output Enable Output Enable

Type

RW

RW

RW

RW

RW

RW

RW

RW

0

See B11[1:0]

1

OE# Pin Controls Output

9SQL4958

Name

OE7

OE6

OE5

OE4

OE3

OE2

OE1

OE0

9SQL4958

Default

1

111

1111

9SQL4954

Name

Reserved

Reserved

Reserved

Reserved

OE3

OE2

OE1

OE0

9SQL4954

Default

x

x

x

x

1111

9SQL4952

Name

Reserved

Reserved

Reserved

Reserved

Reserved

OE1

OE0

Reserved

9SQL4952

Default

xxx

xx

1

1

x

Table 22. Byte 1: Spread Spectrum with VHIGH Control Register

Byte 1

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Control

Function

SS Enable

Readback Bit1

SS Enable

Readback Bit0

Enable software

control of spread

spectrum

SS Software

Control Bit1

SS Software

Control Bit0

Reserved

Controls Output Amplitude

Type

R

R

RW

RW1

RW1

RW

RW

0

See Spread Selection table

SS controlled by

latch (B1[7:6])

See Spread Selection table

00 = 0.6V

10 = 0.75V

1

Values in B1[4:3]

control SS amount

01 = 0.68V

11 = 0.85V

Name

SSENRB1

SSENRB1

SSEN_SWCNTRL

SSENSW1

SSENSW0

AMPLITUDE 1 AMPLITUDE 0

Default

Latch

Latch

0

0

0

x

1

0