Motorola MPC8260 - Manual (Page 575)

MOTOROLA Chapter 19. Serial Communications Controllers (SCCs) 19-19
Part IV. Communications Processor Module
Figure 19-10. Output Delay from CTS Asserted for Synchronous Protocols
If CTS is programmed to envelope data, negating it during frame transmission causes a
CTS lost error. Negating CTS forces RTS high and Tx data to become idle. If
GSMR_H[CTSS] is zero, the SCC must sample CTS before a CTS lost is recognized;
otherwise, the negation of CTS immediately causes the CTS lost condition. See
Figure 19-11.
1. GSMR_H[CTSS] = 0. CTSP is a donÕt care.
TCLK
TXD
Last Bit of Frame Data First Bit of Frame Data
NOTE :
CTS Sampled Low Here
1. GSMR_H[CTSS] = 1. CTSP is a donÕt care.
TCLK
TXD
Last Bit of Frame Data First Bit of Frame Data
NOTE :
(Output)
RTS
(Output)
CTS
(Input)
(Output)
RTS
(Output)
CTS
(Input)