DSA504RT datasheet(45/73 Pages) MICROCHIP

45 / 73 page

DSA504RT

Preliminary Data Sheet

DS50004033A - 45

Address:

Name:

Default:

Type:

0x00A8:0x00A9

fd1_rem

0x0000

R/W

Bit Field

Function Name

Description

15:0

—

FDIV1 fractional divider denominator. Can be used with fd1_den to

sigma-delta modulate FDIV1's lsb when 0ppm frequency conversion

from CLKIN is required.

Address:

Name:

Default:

Type:

0x00AA:0x00AB

fd1_ss_cnt

0x0000

R/W

Bit Field

Function Name

Description

15:0

—

FDIV1 frequency plan A spread spectrum count value.

Address:

Name:

Default:

Type:

0x00AC:0x00AF

fd1_ss_id

0x00000000

R/W

Bit Field

Function Name

Description

31:0

—

FDIV1 frequency plan A spread spectrum count value.

Address:

Name:

Default:

Type:

0x00B0

fd1_config0

0x30

R/W

Bit Field

Function Name

Description

7:6

fr_pdivn

FDIV1 frequency plan A. fractional divider post-divider.

0 = div 1 (bypass; not recommended),

1 = div 2 (typical value)

2 = div 4

3 = div 8

5:4

fr_pd

FDIV1 frequency plan A fractional divider power down control.

0 = Enable

3 = Power-down

3:0

reserved

Address:

Name:

Default:

Type:

0x00B1

fd1_config1

0x80

R/W

Bit Field

Function Name

Description

mode

FDIV1 div bits write mode. When writing fd1_div or fd1_div_b:

0 = Each byte latched separately when written (not recommended)

1 = All bytes of the multi-byte field are latched when the last byte

(highest address) is written

6:0

fr_gain_doff_s

FDIV1 frequency plan A gain offset. Signed 7-bit integer.

DSA504RT Datasheet(PDF) 45 Page - Microchip Technology

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