參數(shù)資料
型號(hào): MC68HC11D3CFU4
廠商: 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述: ROM-based high-performance microcontrollers
中文描述: 基于ROM的高性能微控制器
文件頁(yè)數(shù): 80/124頁(yè)
文件大?。?/td> 840K
代理商: MC68HC11D3CFU4
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SERIAL PERIPHERAL INTERFACE
8-2
TECHNICAL DATA
Figure 8-1 SPI Block Diagram
8.2 SPI Transfer Formats
During an SPI transfer, data is simultaneously transmitted and received. A serial clock
line synchronizes shifting and sampling of the information on the two serial data lines.
A slave select line allows individual selection of a slave SPI device; slave devices that
are not selected do not interfere with SPI bus activities. On a master SPI device, the
select line can optionally be used to indicate a multiple master bus contention. Refer
to
Figure 8-2
.
11 SPI BLOCK
S
S
C
C
M
D
S
S
SPI CONTROL REGISTER
M
W
S
SPI STATUS REGISTER
8/16-BIT SHIFT REGISTER
READ DATA BUFFER
MSB
LSB
INTERNAL
DATA BUS
SPI INTERRUPT
REQUEST
MSTR
SPE
M
D
S
S
SPI CLOCK (MASTER)
SPI CONTROL
SELECT
DIVIDER
÷4
INTERNAL
MCU CLOCK
CLOCK
LOGIC
CLOCK
P
S
M
S
M
M
S
MISO
PD2
MOSI
PD3
SCK
PD4
SS
PD5
S
÷2
÷16 ÷32
8
8
8
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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