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参数资料
| 型号： | ST62P65CM3/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, PDSO28 |
| 封装： | 0.300 INCH, PLASTIC, SOP-28 |
| 文件页数： | 52/86页 |
| 文件大小： | 970K |
| 代理商： | ST62P65CM3/XXX |
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ST62T55C ST62T65C/E65C
SERIAL PERIPHERAL INTERFACE SPI (Cont’d)
SPI DIV Register (DIV)
Address: E1h
—
Read/Write
Reset status: 00h
The SPIDIV register defines the transmission rate
and frame format and contains the interrupt flag.
Bits CD0-CD2, DIV3-DIV6 are read/write while
SPINT can be read and cleared only. Write access
is not allowed if SPRUN in the MOD register is set.
Bit 7 = SPINT:
Interrupt Flag. If SPIE bit=1, SPINT
is automatically set to one by the SPI at the end of
a transmission or reception and an interrupt re-
quest can be generated depending on the state of
the interrupt mask bit in the MOD control register.
This bit is write and read and must be cleared by
user software at the end of the interrupt service
routine.
Bit 6-3 = DIV6-DIV3:
Burst Mode Bit Clock Period
Selection. Define the number of shift register bits
that are transmitted or received in a frame. The
available selections are listed in Table 17. The
normal maximum setting is 8 bits, since the shift
register is 8 bits wide. Note that by setting a great-
er number of bits, in conjunction with the SPIN bit
in the MOD register, unwanted data bits may be fil-
tered from the data stream.
Bit 2-0 = CD2-CD0:
Base/Bit Clock Rate Selec-
tion. Define the division ratio between the core
clock (fINT divided by 13) and the clock supplied to
the Shift Register in Master mode.
Table 16. Base/Bit Clock Ratio Selection
Note: For example, when an 8MHz CPU clock is
used, asynchronous operation at 9600 Baud is
possible (8MHz/13/64). Other Baud rates are
available by proportionally selecting division fac-
tors depending on CPU clock frequency.
Data setup time on Sin is typically 250ns min, while
data hold time is typically 50ns min.
SPI Data/Shift Register (SPIDSR)
Address: E0h
—
Read/Write
Reset status: XXh
SPIDSR is read/write, however write access is not
allowed if the SPRUN bit of Mode Control register
is set to one.
Data is sampled into SPDSR on the SCK edge de-
termined by the CPOL and CPHA bits. The affect
of these setting is shown in the following diagrams.
The Shift Register transmits and receives the Most
Significant Bit first.
Bit 7-0 = DSR7-DSR0:
Data Bits. These are the
SPI shift register data bits.
Miscellaneous Register (MISCR)
Address: DDh
—
Write only
Reset status: xxxxxxxb
Bit 7-1 = D7-D1:
Reserved.
Bit 0 = D0:
Bit 0. This bit, when set, selects the
Sout pin as the SPI output line. When this bit is
cleared, Sout acts as a standard I/O line.
70
SPINT
DOV6
DIV5
DIV4
DIV3
CD2
CD1
CD0
CD2-CD0
Divide Ratio (decimal)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Divide by 1
Divide by 2
Divide by 4
Divide by 8
Divide by 16
Divide by 32
Divide by 64
Divide by 256
DIV6-DIV3
Number of bits sent
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Reserved (not to be used)
1
2
3
4
5
6
7
8
9
10
11
Refer to the
12
description of the
13
DIV6-DIV3 bits in
14
the DIV Register
15
70
D7
D6
D5
D4
D3
D2
D1
D0
70
---
-
D0
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相关代理商/技术参数 |
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| ST62P65CM6/MRYTR | 制造商:STMicroelectronics 功能描述: |
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