Datasheet

Chapter 12 Serial Peripheral Interface (S12SPIV4)
MC9S12XDP512 Data Sheet, Rev. 2.21
Freescale Semiconductor 527
Figure 12-8. Reception with SPIF Serviced in Time
Figure 12-9. Reception with SPIF Serviced too Late
Receive Shift Register
SPIF
SPI Data Register
Data A
Data B
Data A
Data A Received
Data B Received
Data C
Data C
SPIF Serviced
Data C Received
Data B
= Unspecified = Reception in progress
Receive Shift Register
SPIF
SPI Data Register
Data A
Data B
Data A
Data A Received
Data B Received
Data C
Data C
SPIF Serviced
Data C Received
Data B Lost
= Unspecified = Reception in progress