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| 型號(hào)： | MPC823 |
| 廠商： | Motorola, Inc. |
| 英文描述： | Communication Processor Module |
| 中文描述： | 通信處理器模塊 |
| 文件頁(yè)數(shù)： | 5/74頁(yè) |
| 文件大?。?/td> | 234K |
| 代理商： | MPC823 |
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Communication Processor Module
MOTOROLA
MPC823 REFERENCE MANUAL
16-383
S
C
1
P
The parameter RAM values that pertain to the SMCx transmitter can only be written
when the TEN bit in the SMCMR is zero or after the
issued, but before the
RESTART TRANSMIT
The parameter RAM values that pertain to the SMCx receiver can only be written when:
STOP TRANSMIT
command is issued.
command is
J
J
The REN bit in the SMCMR is zero.
The receiver is previously enabled after the
issued.
The
CLOSE RX BD
command is issued before the REN bit is set.
ENTER HUNT MODE
command is
J
Table 16-36. SMCx (UART and Transparent) Parameter RAM Memory Map
ADDRESS
NAME
WIDTH
DESCRIPTION
SMCx Base + 00
RBASE
Half-Word
RX Buffer Descriptor Base Address
SMCx Base + 02
TBASE
Half-Word
TX Buffer Descriptor Base Address
SMCx Base + 04
RFCR
Byte
RX Function Code
SMCx Base + 05
TFCR
Byte
TX Function Code
SMCx Base + 06
MRBLR
Half-Word
Maximum Receive Buffer Length
SMCx Base + 08
RSTATE
Word
RX Internal State
SMCx Base + 0C
RPTR
Word
RX Internal Data Pointer
SMCx Base + 10
RBPTR
Half-Word
RX Buffer Descriptor Pointer
SMCx Base + 12
RCNT
Half-Word
RX Internal Byte Count
SMCx Base + 14
RTMP
Word
RX Temp
SMCx Base + 18
TSTATE
Word
TX Internal State
SMCx Base + 1C
TPTR
Word
TX Internal Data Pointer
SMCx Base + 20
TBPTR
Half-Word
TX Buffer Descriptor Pointer
SMCx Base + 22
TCNT
Half-Word
TX Internal Byte Count
SMCx Base + 24
TTMP
Word
TX Temp
SMCx Base + 28
First Word of Protocol-Specific Area
SMCx Base + 36
Last Word of Protocol-Specific Area
NOTE:
You are only responsible for initializing the items in bold.
SMCx Base = (IMMR & 0xFFFF0000) + 0x3E80 (SMC1) and 0x3F80 (SMC2).
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