参数资料
型号: M68HC11K
厂商: Motorola, Inc.
元件分类: 8位微控制器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8位微控制器
文件页数: 57/80页
文件大小: 420K
代理商: M68HC11K
M68HC11 K Series
MC68HC11KTS/D
MOTOROLA
57
SPIE —Serial Peripheral Interrupt Enable
0 = SPI interrupts disabled
1 = SPI interrupts enabled
SPE —Serial Peripheral System Enable
0 = SPI off
1 = SPI on
DWOM —Port D Wired-OR Mode Option for SPI Pins PD[5:2] (See also WOMS bit in SCCR1.)
0 = Normal CMOS outputs
1 = Open-drain outputs
MSTR —Master Mode Select
0 = Slave mode
1 = Master mode
CPOL, CPHA —Clock Polarity, Clock Phase
Refer to the following figure,
SPI Transfer Format
.
Figure 13 SPI Transfer Format
NOTE
This figure shows transmission order when LSBF = 0 default. If LSBF = 1, data is
transferred in reverse order (LSB first).
SPCR
—Serial Peripheral Control
Register
$0028
Bit 7
6
5
4
3
2
1
Bit 0
SPIE
SPE
DWOM
MSTR
CPOL
CPHA
SPR1
SPR0
RESET:
0
0
0
0
0
1
U
U
2
3
4
5
6
7
8
1
SCK (CPOL = 1)
SCK (CPOL = 0)
SCK CYCLE #
(FOR REFERENCE)
SS (TO SLAVE)
6
5
4
3
2
1
LSB
MSB
MSB
6
5
4
3
2
1
LSB
SAMPLE INPUT
DATA OUT
SAMPLE INPUT
DATA OUT
(CPHA = 1)
(CPHA = 0)
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