DSPIC33EP128GS708 datasheet(236/484 Pages) MICROCHIP

236 / 484 page

dsPIC33EPXXXGS70X/80X FAMILY

DS70005258C-page 236

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To set up the SPIx module for Audio mode:

Clear the SPIxBUFL and SPIxBUFH registers.

If using interrupts:

Clear the interrupt flag bits in the respective

IFSx register.

Set the interrupt enable bits in the

respective IECx register.

Write the SPIxIP bits in the respective IPCx

Write the desired settings to the SPIxCON1L,

SPIxCON1H and SPIxCON2L registers with

AUDEN (SPIxCON1H<15>) = 1.

Clear the SPIROV bit (SPIxSTATL<6>).

Enable SPIx operation by setting the SPIEN bit

(SPIxCON1L<15>).

Write the data to be transmitted to the SPIxBUFL

and SPIxBUFH registers. Transmission (and

reception) will start as soon as data is written to

the SPIxBUFL and SPIxBUFH registers.

SPIxCON1L: SPIx CONTROL REGISTER 1 LOW

R/W-0

U-0

R/W-0

SPIEN

—

SPISIDL

DISSDO

MODE32(1,4) MODE16(1,4)

SMP

CKE(1)

bit 15

bit 8

R/W-0

SSEN(2)

CKP

MSTEN

DISSDI

DISSCK

MCLKEN(3)

SPIFE

ENHBUF

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 15

SPIEN: SPIx On bit

1 = Enables module

0 = Turns off and resets module, disables clocks, disables interrupt event generation, allows SFR

modifications

bit 14

Unimplemented: Read as ‘0’

bit 13

SPISIDL: SPIx Stop in Idle Mode bit

1 = Halts in CPU Idle mode

0 = Continues to operate in CPU Idle mode

bit 12

DISSDO: Disable SDOx Output Port bit

1 = SDOx pin is not used by the module; pin is controlled by port function

0 = SDOx pin is controlled by the module

bit 11-10

MODE32 and MODE16: Serial Word Length Select bits(1,4)

Note 1:

When AUDEN (SPIxCON1H<15>) = 1, this module functions as if CKE = 0, regardless of its actual value.

When FRMEN = 1, SSEN is not used.

MCLKEN can only be written when the SPIEN bit = 0.

This channel is not meaningful for DSP/PCM mode as LRC follows FRMSYPW.

MODE32

MODE16

AUDEN

Communication

32-Bit

16-Bit

8-Bit

24-Bit Data, 32-Bit FIFO, 32-Bit Channel/64-Bit Frame

32-Bit Data, 32-Bit FIFO, 32-Bit Channel/64-Bit Frame

16-Bit Data, 16-Bit FIFO, 32-Bit Channel/64-Bit Frame

16-Bit FIFO, 16-Bit Channel/32-Bit Frame

DSPIC33EP128GS708 Datasheet(PDF) 236 Page - Microchip Technology

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