mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 640

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

Communication Processor Module
If the CTSx pin is programmed to envelope the data, it must remain asserted during frame
transmission or a CTSx lost error occurs. Negation of the CTSx pin forces the RTSx pin high
and the transmit data to an idle state. If the CTSS bit in the GSMR_H is zero, the CTSx pin
must be sampled by a serial communication controller before a CTSx lost is recognized.
Otherwise, the negation of CTSx immediately causes the CTSx lost condition. Refer to
Figure 16-66 for details.
(OUTPUT)
(OUTPUT)
(OUTPUT)
(OUTPUT)
NOTE: CTSS is set to 1 in the GSMR. CTSP is set to 0 or no CTS lost can occur.
NOTE: CTSS is set to 1 in the GSMR. CTSP is set to 0 or no CTS lost can occur.
(INPUT)
(INPUT)
TCLK
TCLK
TXDx
TXDx
CTSx
CTSx
RTSx
RTSx
Note: If the CTSS bit in the GSMR_H is set, all CTSx transitions must occur while the
Figure 16-66. CTSx Lost in Synchronous Protocols
transmit clock is low.
Freescale Semiconductor, Inc.
CTSx SAMPLED LOW HERE
FIRST BIT OF FRAME DATA
For More Information On This Product,
FIRST BIT OF FRAME DATA
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
CTSx SAMPLED HIGH HERE
CTS LOST SIGNALED IN FRAME BD
CTS LOST SIGNALED IN FRAME BD
DATA FORCED HIGH
RTSx FORCED HIGH
DATA FORCED HIGH
RTSx FORCED HIGH
MOTOROLA