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ST72334J 数据表(PDF) 94 Page - STMicroelectronics

部件名 ST72334J
功能描述  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
PDF  125 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST72334J 数据表(HTML) 94 Page - STMicroelectronics

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SERIAL COMMUNICATIONS INTERFACE (Cont’d)
EXTENDED RECEIVE PRESCALER DIVISION
REGISTER (ERPR)
Read/Write
Reset Value: 0000 0000 (00h)
Allows setting of the Extended Prescaler rate divi-
sion factor for the receive circuit.
Bit 7:1 = ERPR[7:0]
8-bit Extended Receive Pres-
caler Register.
The extended Baud Rate Generator is activated
when a value different from 00h is stored in this
register. Therefore the clock frequency issued
from the 16 divider (see Figure 54) is divided by
the binary factor set in the ERPR register (in the
range 1 to 255).
The extended baud rate generator is not used af-
ter a reset.
EXTENDED TRANSMIT PRESCALER DIVISION
REGISTER (ETPR)
Read/Write
Reset Value:0000 0000 (00h)
Allows setting of the External Prescaler rate divi-
sion factor for the transmit circuit.
Bit 7:1 = ETPR[7:0]
8-bit Extended Transmit Pres-
caler Register.
The extended Baud Rate Generator is activated
when a value different from 00h is stored in this
register. Therefore the clock frequency issued
from the 16 divider (see Figure 54) is divided by
the binary factor set in the ETPR register (in the
range 1 to 255).
The extended baud rate generator is not used af-
ter a reset.
Table 18. SCI Register Map and Reset Values
70
ERPR
7
ERPR
6
ERPR
5
ERPR
4
ERPR
3
ERPR
2
ERPR
1
ERPR
0
70
ETPR
7
ETP R
6
ETPR
5
ETP R
4
ETPR
3
ETP R
2
ETPR
1
ETP R
0
Address
(Hex.)
Register
Label
76543210
0050h
SCISR
Reset Value
TDRE
1
TC
1
RDRF
0
IDLE
0
OR
0
NF
0
FE
00
0051h
SCIDR
Reset Value
MSB
x
x
x
xx
xx
LSB
x
0052h
SCIBRR
Reset Value
SOG
00
VPOL
x
2FHDET
x
HVSEL
x
VCORDIS
x
CLPINV
x
BLKINV
x
0053h
SCICR1
Reset Value
R8
x
T8
x0
M
x
WAKE
x
000
0054h
SCICR2
Reset Value
TIE
0
TCIE
0
RIE
0
ILIE
0
TE
0
RE
0
RWU
0
SBK
0
0055h
SCIPBRR
Reset Value
MSB
0
0
0
0000
LSB
0
0057h
SCIPBRT
Reset Value
MSB
0
0
0
0000
LSB
0



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