参数资料
型号: ST72511R9T6S/XXX
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
封装: 14 X 14 MM, TQFP-64
文件页数: 6/164页
文件大小: 1043K
代理商: ST72511R9T6S/XXX
ST72311R, ST72511R, ST72512R, ST72532R
103/164
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 22. 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
xx
LSB
x
0052h
SCIBRR
Reset Value
SCP1
0
SCP0
0
SCT2
0
SCT1
0
SCT0
0
SCR2
0
SCR1
0
SCR0
0
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
SCIERPR
Reset Value
MSB
0
0000
LSB
0
0057h
SCIETPR
Reset Value
MSB
0
0000
LSB
0
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