ST72C334J4TAE STMicroelectronics, ST72C334J4TAE Datasheet - Page 97

• Manufacturer Part Number: ST72C334J4TAE
• Description: 8-bit MCU for automotive with single voltage Flash/ROM memory, ADC, 16-bit timers, SPI, SCI interfaces
• Manufacturer: STMicroelectronics

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
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.
Table 19. SCI Register Map and Reset Values
ERPR
Address
7
7
(Hex.)
0050h
0051h
0052h
0053h
0054h
0055h
0057h
ERPR
6
SCISR
Reset Value
SCIDR
Reset Value
SCIBRR
Reset Value
SCICR1
Reset Value
SCICR2
Reset Value
SCIPBRR
Reset Value
SCIPBRT
Reset Value
ERPR
Register
Label
5
ERPR
4
ERPR
Figure
TDRE
SOG
MSB
MSB
MSB
TIE
3
R8
7
1
x
0
x
0
0
0
ERPR
49) is divided by
2
TCIE
TC
T8
ERPR
6
1
x
0
x
0
0
0
1
ST72334xx-Auto, ST72314xx-Auto, ST72124Jx-Auto
ERPR
0
0
RDRF
VPOL
RIE
5
0
0
0
0
0
x
x
EXTENDED TRANSMIT PRESCALER DIVISION
REGISTER (ETPR)
Read/Write
Reset Value:0000 0000 (00 h)
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
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.
ETPR
2FHDET
IDLE
7
7
ILIE
M
4
0
x
x
x
0
0
0
ETPR
6
HVSEL
WAKE
ETPR
OR
TE
3
0
0
0
0
x
x
x
5
ETPR
VCORDIS
4
RE
NF
2
0
0
0
0
0
x
x
ETPR
Figure
3
CLPINV
ETPR
RWU
49) is divided by
FE
2
1
0
x
x
0
0
0
0
ETPR
1
BLKINV
SBK
LSB
LSB
LSB
97/150
ETPR
0
0
x
x
0
0
0
0
0
0