PIC24F04KA201 datasheet(124/224 Pages) MICROCHIP

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PIC24F04KA201 FAMILY

DS39937B-page 122

Preliminary

SPI1CON1: SPI1 CONTROL REGISTER 1

U-0

R/W-0

—

DISSCK

DISSDO

MODE16

SMP

CKE(1)

bit 15

bit 8

R/W-0

SSEN

CKP

MSTEN

SPRE2

SPRE1

SPRE0

PPRE1

PPRE0

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 15-13

Unimplemented:

Read as ‘0’

bit 12

DISSCK:

Disable SCK1 pin bit (SPI Master modes only)

= Internal SPI clock is disabled, pin functions as I/O

= Internal SPI clock is enabled

bit 11

DISSDO:

Disables SDO1 pin bit

= SDO1 pin is not used by module; pin functions as I/O

= SDO1 pin is controlled by the module

bit 10

MODE16:

Word/Byte Communication Select bit

= Communication is word-wide (16 bits)

= Communication is byte-wide (8 bits)

bit 9

SMP:

SPI1 Data Input Sample Phase bit

Master mode:

= Input data sampled at end of data output time

= Input data sampled at middle of data output time

Slave mode:

SMP must be cleared when SPI1 is used in Slave mode.

bit 8

CKE:

SPI1 Clock Edge Select bit(1)

= Serial output data changes on transition from active clock state to Idle clock state (see bit 6)

= Serial output data changes on transition from Idle clock state to active clock state (see bit 6)

bit 7

SSEN:

Slave Select Enable bit (Slave mode)

=SS1 pin used for Slave mode

=SS1 pin not used by module; pin controlled by port function

bit 6

CKP:

Clock Polarity Select bit

= Idle state for clock is a high level; active state is a low level

= Idle state for clock is a low level; active state is a high level

bit 5

MSTEN:

Master Mode Enable bit

= Master mode

=Slave mode

bit 4-2

SPRE<2:0>:

Secondary Prescale bits (Master mode)

111

= Secondary prescale 1:1

110

= Secondary prescale 2:1

000

= Secondary prescale 8:1

Note 1:

The CKE bit is not used in the Framed SPI modes. The user should program this bit to ‘0’ for the Framed

SPI modes (FRMEN = 1).

PIC24F04KA201 Datasheet(PDF) 124 Page - Microchip Technology

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