参数资料
型号: MC68HC705C9ACFS
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, UVPROM, 2.1 MHz, MICROCONTROLLER
文件页数: 164/177页
文件大小: 1941K
代理商: MC68HC705C9ACFS
Serial Communications Interface (SCI)
Features
MC68HC705C9A — Rev. 4.0
Advance Information
MOTOROLA
Serial Communications Interface (SCI)
87
Figure 9-1. Serial Communications Interface Block Diagram
NOTE:
The serial communications data register (SCI SCDR) is controlled by the
internal R/W signal. It is the transmit data register when written to and
the receive data register when read.
+
INTERNAL BUS
SCI INTERRUPT
TRANSMIT
RECEIVE
TDO
PIN
RDI
TRANSMITTER
CONTROL
RECEIVER
CONTROL
CLOCK
PIN
RECEIVER
FLAG
CONTROL
DATA
TIE
TCIE
RIE
ILIE
TE
RE
SBK
RWU
7
6
5
4
3
2
1
0
$000F
SCCR2
SCSR
$0010
SCCR1
$000E
TRDE
TC
RDRF
IDLE
OR
NF
FE
TE
SBK
$0011
R8
T8
M
WAKE
0
1
2
4
3
6
5
7
76
5
2
3
4
1
WAKEUP
UNIT
RECEIVE
DATA SHIFT
REGISTER
TRANSMIT
DATA SHIFT
REGISTER
$0011
7
&&&&
REGISTER
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