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dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04 REGISTER 18-2: SPIXCON1: SPIx CONTROL REGISTER 1 (CONTINUED) bit 4-2 SPRE: Secondary Prescale bits (Master mode) (2) 111 = Secondary prescale 1:1 110 = Secondary prescale 2:1 • • • 000 = Secondary prescale 8:1 bit 1-0 PPRE: Primary Prescale bits (Master mode) (2) 11 = Primary prescale 1:1 10 = Primary prescale 4:1 01 = Primary prescale 16:1 00 = Primary prescale 64:1 Note 1: The CKE bit is not used in the Framed SPI modes. Program this bit to ‘0’ for the Framed SPI modes (FRMEN = 1). 2: Do not set both Primary and Secondary prescalers to a value of 1:1. 3: This bit must be cleared when FRMEN = 1. DS70291E-page 230 © 2011 Microchip Technology Inc.
dsPIC33FJ32MC302/304, dsPIC33FJ64MCX02/X04 AND dsPIC33FJ128MCX02/X04 REGISTER 18-3: SPIxCON2: SPIx CONTROL REGISTER 2 R/W-0 R/W-0 R/W-0 U-0 U-0 U-0 U-0 U-0 FRMEN SPIFSD FRMPOL — — — — — bit 15 bit 8 U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 U-0 — — — — — — FRMDLY — 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 FRMEN: Framed SPIx Support bit 1 = Framed SPIx support enabled (SSx pin used as frame sync pulse input/output) 0 = Framed SPIx support disabled bit 14 SPIFSD: Frame Sync Pulse Direction Control bit 1 = Frame sync pulse input (slave) 0 = Frame sync pulse output (master) bit 13 FRMPOL: Frame Sync Pulse Polarity bit 1 = Frame sync pulse is active-high 0 = Frame sync pulse is active-low bit 12-2 Unimplemented: Read as ‘0’ bit 1 FRMDLY: Frame Sync Pulse Edge Select bit 1 = Frame sync pulse coincides with first bit clock 0 = Frame sync pulse precedes first bit clock bit 0 Unimplemented: This bit must not be set to ‘1’ by the user application © 2011 Microchip Technology Inc. DS70291E-page 231
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