mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 723

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

16.9.19.8 SCCx ASYNC HDLC PARAMETER RAM MEMORY MAP. When configured as
an SCCx ASYNC HDLC controller, a serial communication controller overlays the structure
used in Table 16-24 with the SCCx ASYNC HDLC parameters described in Table 16-28.
• C_MASK—This value must be initialized with 0x0000F0B8.
• C_PRES—This value must be initialized with 0x0000FFFF.
• BOF—This value must be initialized to the beginning of the flag character (PPP is 0x7E
• EOF—This value must be initialized to the end of the flag character (PPP is 0x7E and
• ESC—This value must be initialized to the control escape character (PPP is 0x 7D and
• Reserved—These areas are temporary storage locations for the microcode. They must
• ZERO—You must set this field to zero.
• RFTHR—The received frames threshold indicates how many frames are received
NOTE: You are only responsible for initializing the items in bold.
and IRLAP is 0xC0).
IrLAP is 0xC1).
IrLAP is 0x7D).
not be initialized or modified.
before the RXF bit is set in the SCCE–ASYNC HDLC register.
SCCx Base+3C
SCCx Base+3E
SCCx Base+4A
SCCx Base+4C
SCCx Base+4E
SCCx Base+5A
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+54
SCCx Base+58
ADDRESS
SCCx Base = (IMMR & 0xFFFF0000) + 0x3D00 (SCC2 ) and 0x3E00 (SCC3).
Table 16-28. SCCx ASYNC HDLC Parameter RAM Memory Map
Freescale Semiconductor, Inc.
TXCTL_TBL
RXCTL_TBL
C_MASK
C_PRES
RFTHR
For More Information On This Product,
NAME
ZERO
NOF
BOF
EOF
ESC
RES
RES
RES
RES
RES
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
WIDTH
Word
Word
Word
Word
RX Control Character Mapping Table
TX Control Character Mapping Table
Beginning Of Flag Character
Received Frames Threshold
Communication Processor Module
Control Escape Character
Number of Opening Flags
End Of Flag Character
DESCRIPTION
CRC Constant
CRC Preset
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
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