參數(shù)資料
型號: MC68HC11D3MFN
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: ROM-based high-performance microcontrollers
中文描述: 基于ROM的高性能微控制器
文件頁數(shù): 68/124頁
文件大?。?/td> 840K
代理商: MC68HC11D3MFN
SERIAL COMMUNICATIONS INTERFACE
For More Information On This Product,
Go to: www.freescale.com
7-2
TECHNICAL DATA
Figure 7-1 SCI Transmitter Block Diagram
7.3 Receive Operation
During receive operations, the transmit sequence is reversed. The serial shift register
receives data and transfers it to a parallel receive data register (SCDR) as a complete
word. Refer to
Figure 7-2
. This double buffered operation allows a character to be
shifted in serially while another character is already in the SCDR. An advanced data
11 SCI TX BLOCK
F
N
O
I
R
T
T
SCSR
INTERRUPT STATUS
S
R
R
T
I
R
T
T
SCCR2
SCI CONTROL 2
TRANSMITTER
CONTROL LOGIC
TCIE
TC
TIE
TDRE
SCI Rx
REQUESTS
SCI INTERRUPT
REQUEST
INTERNAL
DATA BUS
PIN BUFFER
AND CONTROL
H (8) 7
6
5
4
3
2
1
0
L
10 (11) - BIT Tx SHIFT REGISTER
DDD1
PD1
TxD
SCDR
Tx BUFFER
T
S
J
P
B
(WRITE ONLY)
FORCE PIN
DIRECTION (OUT)
S
W
M
T
R
SCCR1
SCI CONTROL 1
TRANSMITTER
BAUD RATE
CLOCK
8
8
8
F
Freescale Semiconductor, Inc.
n
.
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