參數(shù)資料
型號: HC05V7GRS
英文描述: 68HC05V7 General Release Specification
中文描述: 68HC05V7一般版本規(guī)范
文件頁數(shù): 101/170頁
文件大小: 980K
代理商: HC05V7GRS
SECTION 14: SERIAL PERIPHERAL INTERFACE
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
Page 87
Figure 14-3: Serial Peripheral Interface Master-Slave Interconnection
14.3
There are three registers in the SPI which provide control, status, and data storage
functions. These registers are called the serial control register (SPCR), serial peripheral
status register (SPSR), and serial peripheral data I/O register (SPDR) and are described in
the following paragraphs.
SPI REGISTERS
14.3.1
Serial Peripheral Control Register (SPCR)
Figure 14-4: SPI Control Register (SPCR)
SPIE - Serial Peripheral Interrupt Enable
0 = SPIF interrupts disabled
1 = SPI interrupt is SPIF=1
SPE - Serial Peripheral System Enable
0 = SPI system off
1 = SPI system on. Port F becomes SPI pins. SS is a special case. See 9.4
PORT F for additional information.
MSTR - Master Mode Select
0 = Slave mode
1 = Master mode
8-BIT SHIFT REGISTER
8-BIT SHIFT REGISTER
MISO
MOSI
MISO
MOSI
SPI CLOCK
GENERATOR
SCK
SCK
SLAVE
MASTER
SS
SS
V
DD
SPIE
MSTR
CPOL
CPHA
SPR1
SPR0
SPE
$0A
0
0
0
0
1
U
U
0
RESET:
F
Freescale Semiconductor, Inc.
n
.
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