參數(shù)資料
型號: MC68HC05F8FU
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 1.8 MHz, MICROCONTROLLER, PQFP64
封裝: PLASTIC, QFP-64
文件頁數(shù): 90/126頁
文件大?。?/td> 1084K
代理商: MC68HC05F8FU
MOTOROLA
7-2
MC68HC05F8
SERIAL PERIPHERAL INTERFACE
7
7.2.1
Serial Clock (SCK)
The state of SCK between transmissions must be logic “1”. The rst falling edge of SCK signals
the beginning of a transmission. At this time the MSB bit of received data is accepted at the
SDI pin and the MSB bit of transmitted data is presented at the SDO pin. Data is captured at the
SDI pin on the rising edge of SCK. Subsequent falling edges shift the data, and accept the next
received data bit at SDI pin, and present the next transmitted data bit at SDO pin. The transmission
is ended upon the receipt of the LSB bit.
In Master Mode, the format is identical except that the SCK pin is an output and the shift clock now
originates internally. The Master Mode transmission frequency is xed at E/4.
Care should be taken when enabling the SPI; additional clock edges may be present when the
port is switched from standard I/O to SPI.
Figure 7-1 SPI Master-Slave Interconnection
Figure 7-2 SPI Port Timing
8-BIT SHIFT REGISTER
SPI
MASTER
SLAVE
SDO
SDI
SCK
8-BIT SHIFT REGISTER
CLOCK GENERATOR
(447.5KHz)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
112ns 112ns
SCK
SDO
SDI
TPG
64
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
..
.
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
In
c
..
.
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
相關PDF資料
PDF描述
MC68HC05I8FU 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP64
MC68HC05J1DW 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20
MC68HC05J1CP 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP20
MC68HC05J5AJDWR2 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO16
MC68HRC05J5ADWR3 8-BIT, MROM, MICROCONTROLLER, PDSO20
相關代理商/技術參數(shù)
參數(shù)描述
MC68HC05J1 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:HCMOS MICROCONTROLLER UNIT
MC68HC05J1A 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05J1ACDW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05J1ACP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05J1ADW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers