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參數資料
| 型號： | MPC823UM_REV1_16-CPM7 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 10 AMP SUBMINIATURE POWER RELAY |
| 中文描述： | 通信處理器模塊 |
| 文件頁數： | 35/74頁 |
| 文件大小： | 234K |
| 代理商： | MPC823UM_REV1_16-CPM7 |
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Communication Processor Module
MOTOROLA
MPC823 REFERENCE MANUAL
16-413
S
C
1
P
16.11.7.8 SMCx TRANSPARENT CONTROLLER ERRORS.
The serial management
controllers report message reception and transmission error conditions using the channel
buffer descriptors and the SMCE–Transparent register. The following transmission errors
can be detected by the SMCx Transparent controller.
Underrun Error
—
When this error occurs, the channel stops transmitting the buffer,
closes it, sets the UN bit in the buffer descriptor, sets the TXE bit in the event register
and causes an interrupt if the TXE bit is set in the mask register. The channel resumes
transmission after it receives the
RESTART TRANSMIT
command. Underrun cannot
occur between frames.
Overrun Error
—
A serial management controller maintains an internal FIFO for
receiving data. The communication processor module begins programming the SDMA
channel if the data buffer is in external memory when the first character is received into
the FIFO. If a FIFO overrun occurs, a serial management controller writes the received
data character to the internal FIFO over the previously received character. The previous
character and its status bits are lost. Then the channel closes the buffer, sets the OV
bit in the receive buffer descriptor, and generates the receive interrupt if it is enabled.
Reception then continues as normal.
16.11.7.9 SMCx TRANSPARENT MODE REGISTER.
When a serial management
controller is in transparent mode, the 16-bit, memory-mapped, read/write SMCx mode
register is referred to as the SMCx transparent mode register (SMCMR–Transparent). The
function of bits 8-15 is common to each SMCx protocol, but bits 0-7 vary according to the
protocol selected by the SM bits of this register.
Bits 0, 5, and 8–9—Reserved
These bits are reserved and must be set to 0.
SMCMR–TRANSPARENT
BIT
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
FIELD
RES
CLEN
RES
BS
REVD
RESERVED
SM
DM
TEN
REN
RESET
0
0
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
ADDR
(IMMR & 0xFFFF0000) + 0xA82 (SMC1), 0xA92 (SMC2)
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