Freescale Semiconductor MCF54455 Reference Manual page 721

Synchronous Serial Interface (SSI)
Table 27-31. SSI Control Bits Requiring SSI to be Disabled Before Change
27-54
Control Register
SSI_CR
SSI_IER
[9]=RXBIT0 and TXBIT0
[8]=RFEN1 and TFEN1
[7]=RFEN0 and TFEN0
SSI_RCR [5]=RXDIR and TXDIR
SSI_TCR [4]=RSHFD and TSHFD
[3]=RSCKP and TSCKP
[0]=REFS and TEFS
SSI_CCR
SSI_ACR
Bit
[9]=CIS
[8]=TCH
[7]=MCE
[6:5]=I2S
[4]=SYN
[3]=NET
[22]=RDMAE
[20]=TDMAE
[6]=TFDIR
[2]=RFSI and TFSI
[1]=RFSL and TFSL
[16:13]=WL
[1]=FV
[10:5]=FRDIV
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