S912XHZ512F1VAG Datasheet, PDF (611/978 Pages) Freescale Semiconductor, Inc – Covers MC9S12XHZ384, MC9S12XHZ256

Data A Received
Receive Shift Register
Data A
Chapter 16 Serial Peripheral Interface (S12SPIV4)
Data B Received
Data C Received
SPIF Serviced
Data B
Data C
SPIF
SPI Data Register
Data A
Data B
Data C
= Unspecified
= Reception in progress
Figure 16-8. Reception with SPIF Serviced in Time
Data A Received
Receive Shift Register
SPIF
Data A
Data B Received
Data C Received
Data B Lost
SPIF Serviced
Data B
Data C
SPI Data Register
Data A
Data C
= Unspecified
= Reception in progress
Figure 16-9. Reception with SPIF Serviced too Late
MC9S12XHZ512 Data Sheet, Rev. 1.06
Freescale Semiconductor
611