Vault 7: Projects
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PIC24F Family Reference Manual
DS39699B-page 23-15 Advance Information © 2007 Microchip Technology Inc.
Figure 23-7: SPIx Slave Mode Timing (CKE = 1)
(4)
SCK Input
(CKP = 1
SCK Input
(CKP = 0
Input
Sample
SDI Input
bit 7
bit 0
SDO
bit 7
bit 6
bit 5 bit 4
bit 3
bit 2
bit 1 bit 0
SPIxIF
(SMP = 0)
CKE = 1)
CKE = 1)
(SMP = 0)
Write to
SPIxBUF
SPIxSR to
SPIxRXB
SSx
(1,2)
SPIxTBF
(3)
SPIxRBF
Output
Note 1: The SSx
pin must be used for Slave mode operation when CKE = 1.
2: When the SSEN (SPIxCON1<7>) bit is set to ‘1’, the SSx
pin must be driven low so as to enable transmission and
reception in Slave mode.
3: Transmit data is held in SPIxTXB and SPIxTBF remains set until all bits are transmitted.
4: Operation for 8-bit mode shown; the 16-bit mode is similar.
Protego_Release_01_05-Related-OEM-Documentation-PIC24FJ32MC10X-Reference_Manual-Section23-Serial_Peripheral_Interface.pdf