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CST12.0MTWA Datasheet(PDF) 96 Page - STMicroelectronics

Part # CST12.0MTWA
Description  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES
PDF  153 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

CST12.0MTWA Datasheet(HTML) 96 Page - STMicroelectronics

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SERIAL COMMUNICATIONS INTERFACE (Cont’d)
EXTENDED RECEIVE PRESCALER DIVISION
REGISTER (ERPR)
Read/Write
Reset Value: 0000 0000 (00 h)
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 3.) 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 3.) 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
ETPR
6
ETPR
5
ETPR
4
ETPR
3
ETPR
2
ETPR
1
ETPR
0
Address
(Hex.)
Register
Label
76
54
32
10
0050h
SCISR
Reset Value
TDRE
1
TC
1
RDRF
0
IDLE
0
OR
0
NF
0
FE
00
0051h
SCIDR
Reset Value
MSB
xx
x
x
x
x
x
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
x00
0
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
00
0
0
0
0
0
LSB
0
0057h
SCIPBRT
Reset Value
MSB
00
0
0
0
0
0
LSB
0



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