參數(shù)資料
型號: ST72P621L4B1
英文描述: LOW SPEED USB 8-BIT MCU WITH 3 ENDPOINTS. FLASH OR ROM MEMORY. LVD. WDG. 10-BIT ADC. 2 TIMERS. SCI. SPI
中文描述: 低速USB 8端點(diǎn)與3位微控制器。 FLASH或ROM存儲器。內(nèi)徑。水分散粒劑。 10位ADC。 2定時器。脊髓損傷。的SPI
文件頁數(shù): 110/133頁
文件大?。?/td> 1864K
代理商: ST72P621L4B1
ST7262
78/133
SERIAL COMMUNICATIONS INTERFACE (Cont’d)
DATA REGISTER (SCIDR)
Read/Write
Reset Value: Undefined
Contains the Received or Transmitted data char-
acter, depending on whether it is read from or writ-
ten to.
The Data register performs a double function (read
and write) since it is composed of two registers,
one for transmission (TDR) and one for reception
(RDR).
The TDR register provides the parallel interface
between the internal bus and the output shift reg-
ister (see Figure 46).
The RDR register provides the parallel interface
between the input shift register and the internal
bus (see Figure 46).
BAUD RATE REGISTER (SCIBRR)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:6= SCP[1:0]
First SCI Prescaler
These 2 prescaling bits allow several standard
clock division ranges:
Bits 5:3 = SCT[2:0]
SCI Transmitter rate divisor
These 3 bits, in conjunction with the SCP1 & SCP0
bits define the total division applied to the bus
clock to yield the transmit rate clock in convention-
al Baud Rate Generator mode.
Bits 2:0 = SCR[2:0]
SCI Receiver rate divisor.
These 3 bits, in conjunction with the SCP[1:0] bits
define the total division applied to the bus clock to
yield the receive rate clock in conventional Baud
Rate Generator mode.
70
DR7
DR6
DR5
DR4
DR3
DR2
DR1
DR0
70
SCP1
SCP0
SCT2
SCT1
SCT0
SCR2
SCR1
SCR0
PR Prescaling factor
SCP1
SCP0
10
0
30
1
41
0
13
1
TR dividing factor
SCT2
SCT1
SCT0
10
0
20
0
1
40
1
0
80
1
16
1
0
32
1
0
1
64
1
0
128
1
RR Dividing factor
SCR2
SCR1
SCR0
10
0
20
0
1
40
1
0
80
1
16
1
0
32
1
0
1
64
1
0
128
1
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