參數(shù)資料
型號： ST72331
廠商： 意法半導(dǎo)體
英文描述： 8-Bit MCU with 8 to 16K ROM/OTP/EPROM, 256 EEPROM, 384 to 512 Bytes RAM, ADC, WDG, SCI, SPI and 2 Timers(8位微控制器(8M))
中文描述： 8位微控制器與8至16K的光碟/雙層/存儲器，256的EEPROM，384字節(jié)RAM為512，藝發(fā)局，水分散粒劑，脊髓損傷，SPI和2計(jì)時(shí)器（8位微控制器（8米））
文件頁數(shù)： 62/98頁
文件大小： 1123K
代理商： ST72331
62/98
ST72331
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 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.
Table 17. SCI Register Map and Reset Values
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.
7
6
5
4
3
2
1
0
ERPR
7
ERPR
6
ERPR
5
ERPR
4
ERPR
3
ERPR
2
ERPR
1
ERPR
0
7
6
5
4
3
2
1
0
ETPR
7
ETPR
6
ETPR
5
ETPR
4
ETPR
3
ETPR
2
ETPR
1
ETPR
0
Address
(Hex.)
50
Register
Name
7
6
5
4
3
2
1
0
SR
Reset Value
DR
Reset Value
BRR
Reset Value
CR1
Reset Value
CR2
Reset Value
ERPR
Reset Value
ETPR
Reset Value
TDRE
1
DR7
-
SCP1
0
R8
-
TIE
0
ERPR7
0
TC
1
DR6
-
SCP0
0
T8
-
TCIE
0
ERPR6
0
RDRF
0
DR5
-
SCT2
x
IDLE
0
DR4
-
SCT1
x
M
-
ILIE
0
OR
0
DR3
-
SCT0
x
WAKE
-
TE
0
NF
0
DR2
-
SCR2
x
FE
0
DR1
-
SCR1
x
-
0
51
DR0
-
SCR0
x
52
53
-
-
-
-
54
RIE
0
RE
0
RWU
0
SBK
0
55
ERPR5
0
ERPR4
0
ERPR3
0
ERPR2
0
ERPR1
0
ERPR0
0
57
ETPR7
0
ETPR6
0
ETPR5
0
ETPR4
0
ETPR3
0
ETPR2
0
ETPR1
0
ETPR0
0
124
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