參數(shù)資料
型號: MC68HCL05C8A
廠商: Motorola, Inc.
英文描述: 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述: 8位微控制器單元(MCU)。(8位微控制器)
文件頁數(shù): 66/156頁
文件大?。?/td> 755K
代理商: MC68HCL05C8A
L
G
R
Serial Communications Interface (SCI)
General Release Specification
MC68HC05C8A
Rev. 3.0
66
Serial Communications Interface (SCI)
MOTOROLA
When the shift register is not transmitting a character, the PD1/TDO pin
goes to the idle condition, logic 1. If software clears the TE bit during the
idle condition, and while TDRE is set, the transmitter relinquishes control
of the PD1/TDO pin.
Figure 9-2. SCI Transmitter
0
T8
TCIE
TC
BIT 6
SCDR ($0011)
6
0
BIT 7
5
4
3
0
2
1
BIT 0
SCR0
0
BAUD RATE REGISTER (BAUD)
SCI CONTROL REGISTER 1 (SCCR1)
SCI CONTROL REGISTER 2 (SCCR2)
SCI STATUS REGISTER (SCSR)
SCI DATA REGISTER (SCDR)
SCP0
M
ILIE
IDLR
BIT 4
SCR2
0
SCR1
0
$000D
$000E
$000F
$0010
$0011
R8
TIE
TDRE
BIT 7
WAKE
TE
OR
BIT 3
RIE
RDRF
BIT 5
RE
NF
BIT 2
RWU
FE
SBK
0
SCP1
0
BIT 1
BIT 0
TRANSMIT SHIFT REGISTER
7 6 5 4 3 2 1 0
8
H
L
TRANSMITTER
CONTROL LOGIC
L
S
P
B
TDRE
TC
M
T8
TE
PIN BUFFER
AND CONTROL
PD1/
TDO
INTERNAL DATA BUS
SBK
TIE
TCIE
SCI
RECEIVE
REQUESTS
SCI
INTERRUPT
REQUEST
1X
BAUD RATE
CLOCK
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