mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 569

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

16.7.3 Enabling Connections to the Time-Slot Assigner
Each serial communication controller and serial management controller can be
independently enabled to connect to the time-slot assigner. A serial communication
controller is connected to the time-slot assigner by setting the SC2 bit in the SICR. The serial
management controllers are connected to the time-slot assigner by setting the SMCx field
of the SIMODE register. Additionally, the TDMA interface must be enabled before it can be
connected to the time-slot assigner by setting the ENA field in the SIGMR. Once there is a
connection, the exact routing decisions are made in the serial interface RAM. Refer to
Figure 16-45 for more information.
16.7.4 Serial Interface RAM Operation
The serial interface has two 64
the TDMA channel to the serial communication and management controllers. These RAMs
are uninitialized after power-on and, to avoid unwanted results, the host CPU must program
them before enabling the multiplexed channels. The RAMs consist of 16-bit entries that
define the routing control and each entry can control anywhere from 1 to 16 bits or 1 to 16
bytes. In addition to the routing, up to four strobe pins (all active high) can be asserted,
depending on how the RAM is programmed. You can configure the serial interface RAM in
the following formats to support the TDM channel:
• One multiplexed channel with static frames
• One multiplexed channel with dynamic frames
SCC2
SCC3
SMC1
SMC2
Figure 16-45. Enabling Connections Through the Serial Interface
INTERFACE
SERIAL
Freescale Semiconductor, Inc.
RAM
For More Information On This Product,
MPC823 REFERENCE MANUAL
CONTROL LOGIC
32-bit static RAMs that are used to control the routing of
Go to: www.freescale.com
TIME-SLOT
ASSIGNER
EN
SMC2=0
SC3=0
SC2=0
SMC1=0
ENA=1 TO ENABLE
Communication Processor Module
SCC2 PINS
SCC3 PINS
SMC1 PINS
TDM PINS
MULTIPLEXED
INTERFACE
NONMULTIPLEXED
INTERFACE
16-117