参数资料
型号: MC68HSC05C9AP
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PDIP40
封装: PLASTIC, DIP-40
文件页数: 155/160页
文件大小: 4128K
代理商: MC68HSC05C9AP
NON-DISCLOSURE
AGREEMENT
REQUIRED
Serial Peripheral Interface
General Release Specification
MC68HC05C9A Rev. 4.0
Serial Peripheral Interface
The SPI is double buffered on read, but not on write. If a write is
performed during data transfer, the transfer occurs uninterrupted, and
the write will be unsuccessful. This condition will cause the write collision
(WCOL) status bit in the SPSR to be set. After a data byte is shifted, the
SPIF flag of the SPSR is set.
In the master mode, the SCK pin is an output. It idles high or low,
depending on the CPOL bit in the SPCR, until data is written to the shift
register, at which point eight clocks are generated to shift the eight bits
of data and then SCK goes idle again.
In a slave mode, the slave select start logic receives a logic low at the
SS pin and a clock at the SCK pin. Thus, the slave is synchronized with
the master. Data from the master is received serially at the MOSI line
and loads the 8-bit shift register. After the 8-bit shift register is loaded, its
data is parallel transferred to the read buffer. During a write cycle, data
is written into the shift register, then the slave waits for a clock train from
the master to shift the data out on the slave’s MISO line.
Figure 10-3 illustrates the MOSI, MISO, SCK, and SS master-slave
interconnections.
Figure 10-3. Serial Peripheral Interface Master-Slave
Interconnection
SPI SHIFT REGISTER
7 6 5 4 3 2 1 0
SPI SHIFT REGISTER
7 6 5 4 3 2 1 0
SPDR ($000C)
PD3/MOSI
PD2/MISO
PD5/SS
PD4/SCK
MASTER MCU
SLAVE MCU
I/O PORT
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相关PDF资料
PDF描述
MC9S08RD32FG 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP44
MC9S08RG60CFG 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP44
MC68HC11E0VFU2 8-BIT, 2 MHz, MICROCONTROLLER, PQFP64
MC9S12DJ256VPV 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
MC68030RC40C 32-BIT, 40 MHz, MICROPROCESSOR, CPGA128
相关代理商/技术参数
参数描述
MC68HSC705C8ACFB 制造商:Rochester Electronics LLC 功能描述:8 BIT MCU, 304 BYTES RAM - Bulk
MC68HSC705C8ACP 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述:
MC68HSC705C8ACS 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68HSC705J1ACDW 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68HSC705J1ACP 制造商:Rochester Electronics LLC 功能描述:8 BIT MCU, 64 BYTES RAM - Bulk