Table of Contents
Advertisement
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.
Table 16-38. SMCx GCI Parameter RAM Memory Map
ADDRESS
SMCx Base + 00
M_RXBD
SMCx Base + 02
M_TXBD
SMCx Base + 04
CI_RXBD
SMCx Base + 06
CI_TXBD
SMCx Base + 08
SMCBase + 0A
SMCx Base + 0C
SMCx Base + 0E
NOTE:
You are only responsible for initializing the items in bold.
SMCx Base = (IMMR & 0xFFFF0000) + 0x3E80 (SMC1) and 0x3F80 (SMC2).
• 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.
0
1
2
E
L
RE
OFFSET + 0
NOTE: You are only responsible for initializing the items in bold.
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.
MOTOROLA
NAME
WIDTH
Half-word
Half-word
Half-word
Half-word
Temp1
Half-word
Temp2
Half-word
Temp3
Half-word
Temp4
Half-word
3
4
5
6
7
MS
RESERVED
MPC823e REFERENCE MANUAL
Communication Processor Module
DESCRIPTION
Monitor Channel RX Buffer Descriptor
Monitor Channel TX Buffer Descriptor
Circuit Interface Channel
RX Buffer Descriptor
Circuit Interface Channel
TX Buffer Descriptor
8
9
10
11
12
13
DATA
14
15
16-427
Advertisement
Table of Contents
