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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 24/74頁(yè) |
| 文件大小： | 234K |
| 代理商： | MPC823UM_REV1_16-CPM7 |
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Communication Processor Module
16-402
MPC823 REFERENCE MANUAL
MOTOROLA
S
C
1
P
16.11.6.13 SMCx UART EVENT REGISTER.
When a serial management controller is in
UART mode, the 8-bit memory-mapped SMCx event register is referred to as the SMCx
UART event (SMCE–UART) register. It is used to generate interrupts and report events
recognized by the SMCx UART channel. When an event is recognized, the SMCx UART
controller sets the corresponding bit in this register.
A bit is cleared by writing a 1 (writing a zero has no effect) and more than one bit can be
cleared at a time. All unmasked bits must be cleared before the communication processor
module clears the internal interrupt request. This register is cleared by reset and can be read
at any time. An example of the timing of various events in the SMCE–UART register is
illustrated in Figure 16-117.
Bit 0, 2, and 4—Reserved
These bits are reserved and must be set to 0.
BRKE—Break End
This bit indicates that an end of break sequence has been detected. It occurs after one idle
bit is received after a break sequence.
BRK—Break Character Received
This bit indicates that a break character has been received. If a very long break sequence
occurs, this interrupt only occurs once after the first all-zeros character is received.
BSY—Busy Condition
This bit indicates that a character has been received and discarded due to a lack of buffers.
It is be set in the middle of the last stop bit of the first receive character for which there is no
available buffer. Reception continues when an empty buffer is provided.
TX—TX Buffer
This bit indicates that a buffer has been transmitted over the SMCx UART channel. It is set
once the transmit data of the last character in the buffer is written to the transmit FIFO. You
must wait two character times to be sure that the data is completely sent over the transmit
pin.
SMCE –UART
BIT
0
1
2
3
4
5
6
7
FIELD
RESERVED
BRKE
RESERVED
BRK
RESERVED
BSY
TX
RX
RESET
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
ADDR
(IMMR & 0xFFFF0000) + 0xA86 (SMC1), 0xA96 (SMC2)
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