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參數(shù)資料
| 型號(hào)： | MC13214R2 |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, BGA71 |
| 封裝： | 9 X 9 MM, 1 MM HEIGHT, ROHS COMPLIANT, LGA-71 |
| 文件頁數(shù)： | 33/70頁 |
| 文件大?。?/td> | 802K |
| 代理商： | MC13214R2 |
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MC13211/212/213/214 Technical Data, Rev. 0.0,
Freescale Semiconductor
39
5.7.5.2
SCI Block Diagrams
The SCI allows full-duplex, asynchronous, NRZ serial communication among the MCU and remote
devices, including other MCUs. The SCI comprises a baud rate generator, transmitter, and receiver block.
The transmitter and receiver operate independently, although they use the same baud rate generator.
During normal operation, the MCU monitors the status of the SCI, writes the data to be transmitted, and
processes received data. Figure 22 and Figure 23 show the SCI transmitter and receiver block diagrams.
Figure 22. SCI Transmitter
H
8
7
6
5
4
3
2
1
0
L
SCID – Tx BUFFER
(WRITE-ONLY)
INTERNAL BUS
ST
OP
11-BIT TRANSMIT SHIFT REGISTER
ST
ART
SHIFT DIRECTION
LSB
1 BAUD
RATE CLOCK
PARITY
GENERATION
TRANSMIT CONTROL
SHIF
T
ENABLE
PREA
MBLE
(ALL
1s)
BREAK
(
A
LL
0s
)
ENABLE
SCI CONTROLS TxD1
TxD1 DIRECTION
TO TxD1
PIN LOGIC
LOOP
CONTROL
TO RECEIVE
DATA IN
TO TxD1 PIN
Tx INTERRUPT
REQUEST
LOOPS
RSRC
TIE
TC
TDRE
M
PT
PE
TCIE
TE
SBK
T8
TXDIR
L
O
A
D
FR
OM
SCI
x
D
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