mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 685

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

16.9.16.4 SCCx HDLC PARAMETER RAM MEMORY MAP.When configured to operate
in HDLC mode, the serial communication controllers overlay the structure used in Table 16-
24 with the HDLC parameters that are described in Table 16-27 below.
NOTE:
SCCx Base + 3C
SCCx Base + 3E
SCCx Base + 4A
SCCx Base + 4C
SCCx Base + 4E
SCCx Base + 5A
SCCx Base + 30
SCCx Base + 34
SCCx Base + 38
SCCx Base + 40
SCCx Base + 42
SCCx Base + 44
SCCx Base + 46
SCCx Base + 48
SCCx Base + 50
SCCx Base + 52
SCCx Base + 54
SCCx Base + 56
SCCx Base + 58
ADDRESS
You are only responsible for initializing the items in bold.
SCCx base = (IMMR & 0xFFFF0000) + 0x3D00 (SCC2) and 0x3E00 (SCC3).
All references to registers in the parameter RAM table are actually implemented in the dual-port RAM
area as a memory-based register.
Note: The SCCx HDLC controller must receive a maximum of eight clocks (after a
Table 16-27. SCCx HDLC Parameter RAM Memory Map
frame is received) to complete the reception.
Freescale Semiconductor, Inc.
MAX_CNT
C_MASK
HADDR1
HADDR2
HADDR3
HADDR4
TMP_MB
C_PRES
NMARC
HMASK
CRCEC
ABTSC
RETRC
RFTHR
RFCNT
For More Information On This Product,
DISFC
NAME
MFLR
TMP
RES
MPC823 REFERENCE MANUAL
Go to: www.freescale.com
Half-word
Half-word
Half-word
Half-word
Half-word
Half-word
Half-word
Half-word
Half-word
Half-word
Half-word
Half-word
Half-word
Half-word
Half-word
Half-word
WIDTH
Word
Word
Word
User-Defined Frame Address Mask
Nonmatching Address RX Counter
User-Defined Frame Address
User-Defined Frame Address
User-Defined Frame Address
User-Defined Frame Address
Frame Transmission Counter
Received Frames Threshold
Max Frame Length Register
Communication Processor Module
Maximum Length Counter
Abort Sequence Counter
Received Frames Count
Discard Frame Counter
CRC Error Counter
DESCRIPTION
CRC Constant
Temp Storage
Temp Storage
CRC Preset
Reserved
16-233