参数资料
型号: MC68HC05V7CFNR2
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC68
封装: PLASTIC, LCC-68
文件页数: 4/170页
文件大小: 589K
代理商: MC68HC05V7CFNR2
SECTION 14: SERIAL PERIPHERAL INTERFACE
MOTOROLA
Page 87
MC68HC05V7 Specification Rev. 1.0
Figure 14-3:
Serial Peripheral Interface Master-Slave Interconnection
14.3
SPI REGISTERS
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.
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
MISO
MOSI
MISO
MOSI
SPI CLOCK
GENERATOR
SCK
SLAVE
MASTER
SS
VDD
SPIE
MSTR
CPOL
CPHA
SPR1
SPR0
SPE
$0A
0
0001
U
0
RESET:
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