mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 632

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

Communication Processor Module
• RBASE and TBASE—The dual-port RAM starts receiving and transmitting data for the
NOTE:
SCCx buffer descriptors in the RBASE and TBASE entries. They allow more flexibility
in partitioning the SCCx buffer descriptors. By selecting RBASE and TBASE entries for
a serial communication controller and by setting the W bit in the last buffer descriptor in
each buffer descriptor list, you can select how many buffer descriptors to allocate for
the transmit and receive side of a serial communication controller. However, you must
initialize these entries before enabling the corresponding channel.
SCCx Base + 0C
SCCx Base + 1C
SCCx Base + 2C
SCCx Base + 00
SCCx Base + 02
SCCx Base + 04
SCCx Base + 05
SCCx Base + 06
SCCx Base + 08
SCCx Base + 10
SCCx Base + 12
SCCx Base + 14
SCCx Base + 18
SCCx Base + 20
SCCx Base + 22
SCCx Base + 24
SCCx Base + 28
SCCx Base + 30
SCCx Base + xx
ADDRESS
Table 16-24. SCCx Parameter RAM Memory Map For All Protocols
You are only responsible for initializing the items in bold.
SCCx Base = (IMMR & 0xFFFF0000) + 0x3D00 (SCC2) and 0x3E00 (SCC3).
Note: RBASE and TBASE must contain a value that is divisible by eight.
RSTATE
TSTATE
MRBLR
Freescale Semiconductor, Inc.
RBASE
TBASE
RBPTR
TBPTR
NAME
RCRC
RFCR
RPTR
RCNT
RTMP
TTMP
TCRC
TFCR
TPTR
TCNT
For More Information On This Product,
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
Half-word
Half-word
Half-word
Half-word
Half-word
Half-word
Half-word
WIDTH
Word
Word
Word
Word
Word
Word
Word
Word
Byte
Byte
First Word of Protocol-Specific Area
Last Word of Protocol-Specific Area
RX Buffer Descriptor Base Address
TX Buffer Descriptor Base Address
Maximum Receive Buffer Length
RX Buffer Descriptor Pointer
TX Buffer Descriptor Pointer
RX Internal Data Pointer
TX Internal Data Pointer
RX Internal Byte Count
TX Internal Byte Count
Temp Transmit CRC
Temp Receive CRC
RX Function Code
TX Function Code
RX Internal State
TX Internal State
DESCRIPTION
RX Temp
TX Temp
MOTOROLA