mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 676

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

Communication Processor Module
16.9.15.18 SCCx UART EVENT REGISTER. When a serial communication controller is in
UART mode, the 16-bit memory-mapped SCCx event register is referred to as the SCCx
UART event register (SCCE–UART). Since each protocol has specific requirements, the
SCCE bits are different for each implementation. This register is used to report events
recognized by the UART channel and to generate interrupts. When an event is recognized,
the SCCx UART controller sets the corresponding bit in the UART event register. Interrupts
generated by this register can be masked in the SCCM–UART register. An example of
interrupts that can be generated by the SCCx UART controller is illustrated in Figure 16-75.
UART SCCE
LEGEND:
NOTES:
NOTES:
EVENTS
UART SCCE
TXDx
RXDx
RTSx
CTSx
CDx
RECEIVED BY UART
EVENTS
1. The first receive event assumes receive buffers are 6 bytes each.
2. The second IDL event occurs after an all-ones character is received.
3. The second RX event position is programmable based on the MAX_IDL value.
4. The BRKs event occurs after the first break character is received.
5. The CDx event must be programmed in the port C parallel I/O, not in the SCC itself.
1. TX event assumes all seven characters were put into a single buffer and CR is set to 1 in the TX buffer descriptor.
2. The CTSx event must be programmed in the port C parallel I/O, not in the SCC itself.
TRANSMITTED BY UART
CHARACTERS
TIME
A receive control character defined not to be stored in the receive buffer.
CHARACTERS
LINE IDLE
CDx
Figure 16-75. SCCx UART Interrupt Event Example
LINE IDLE
Freescale Semiconductor, Inc.
IDL
For More Information On This Product,
CTSx
MPC823 REFERENCE MANUAL
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10 CHARACTERS
7 CHARACTERS
RX
CCR
TX
IDL
CTSx
LINE IDLE
RX
LINE IDLE
IDL
BRKs
BREAK
BRKe
MOTOROLA
IDL
CDx