參數(shù)資料
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)： 46/74頁(yè)
文件大?。?/td> 234K
代理商： MPC823
Communication Processor Module
16-424
MPC823 REFERENCE MANUAL
MOTOROLA
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16.11.8.2 SMCx GCI PARAMETER RAM MEMORY MAP.
The SMCx GCI parameter
RAM area begins at the same offset from each SMCx base area. The SMCx in GCI mode
has a very different parameter RAM memory map than the SMCx in UART or transparent
mode. In GCI mode, the general-purpose parameter RAM contains the buffer descriptors,
instead of pointers, to the buffer descriptors. You can see the difference when you compare
Table 16-38 with Table 16-36. The SMCx in GCI mode contains no protocol-specific
parameter RAM.
M_RXBD—The SMCx monitor channel receive buffer descriptor is used by the
communication processor module to report information about the monitor channel
receive byte.
E—Empty
When a serial management controller uses the monitor channel protocol, it waits until
the core sets this bit before acknowledging the monitor channel data.
0 =
The communication processor module clears this bit to indicate that the data
byte associated with this buffer descriptor is now available to the core.
1 =
The core sets this bit to indicate that the data byte associated with this buffer
descriptor has been read.
Table 16-38. SMCx GCI Parameter RAM Memory Map
ADDRESS
NAME
WIDTH
DESCRIPTION
SMCx Base + 00
M_RXBD
Half-word
Monitor Channel RX Buffer Descriptor
SMCx Base + 02
M_TXBD
Half-word
Monitor Channel TX Buffer Descriptor
SMCx Base + 04
CI_RXBD
Half-word
Circuit Interface Channel
RX Buffer Descriptor
SMCx Base + 06
CI_TXBD
Half-word
Circuit Interface Channel
TX Buffer Descriptor
SMCx Base + 08
Temp1
Half-word
SMCBase + 0A
Temp2
Half-word
SMCx Base + 0C
Temp3
Half-word
SMCx Base + 0E
Temp4
Half-word
NOTE:
You are only responsible for initializing the items in bold.
SMCx Base = (IMMR & 0xFFFF0000) + 0x3E80 (SMC1) and 0x3F80 (SMC2).
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
OFFSET + 0
E
L
RE
MS
RESERVED
DATA
NOTE: You are only responsible for initializing the items in bold.
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