DS20006554A datasheet(60/94 Pages) MICROCHIP

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ZL30260-ZL30263

Data Sheet

DS20006554A

AID1

APLL Increment/Decrement Register 1

119h

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Name

AID[7:0]

Default

Bits 7 to 0: APLL Increment/Decrement (AID[7:0]). The full 32-bit AID[31:0] register spans this register through

AID4. It is an unsigned integer. There are two uses for this field: frequency increment/decrement, and spread

spectrum modulation. The two uses are mutually-exclusive, i.e. only one can be in use at a time.

For frequency increment/decrement, AID[23:0] x 27 is

added to the APLL’s feedback divider value each time the

trigger specified by AIDCR.FISS changes state. AID[23:0] x 27

is subtracted from the APLL’s feedback divider value

each time the trigger specified by AIDCR.FDSS changes state. AID[31:24] is ignored for frequency

increment/decrement. ACR1.USEFDIV must be set to 0 for this behavior. See section 5.5.7.

For spread spectrum modulation, the full 32-bit AID[31:0] value is subtracted (decremented) and added

(incremented) to the zero PPM value every APLL input clock cycle for the number of clock cycles specified by the

ASCNT registers. The zero PPM value is the nominal AFBDIV register value (when ACR1.USEFDIV=0) or the

nominal fractional output divider value (when ACR1.USEFDIV=1). See section 5.5.8.

AID2

APLL Increment/Decrement Register 2

11Ah

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Name

AID[15:8]

Default

Bits 7 to 0: APLL Increment/Decrement (AID[15:8]). See the AID1 register description.

AID3

APLL Increment/Decrement Register 3

11Bh

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Name

AID[23:16]

Default

Bits 7 to 0: APLL Increment/Decrement (AID[23:16]). See the AID1 register description.

AID4

APLL Increment/Decrement Register 4

11Ch

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Name

AID[31:24]

Default

Bits 7 to 0: APLL Increment/Decrement (AID[31:24]). See the AID1 register description.

DS20006554A Datasheet(PDF) 60 Page - Microchip Technology

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