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參數(shù)資料
| 型號(hào)： | AN1816 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | USING THE HC912B32 TO IMPLEMENT THE DISTRIBUTED SYSTEMS INTERFACE (DSI) PROTOCOL |
| 中文描述： | 使用本HC912B32為實(shí)施分布式系統(tǒng)接口（DSI）協(xié)議 |
| 文件頁數(shù)： | 7/24頁 |
| 文件大?。?/td> | 332K |
| 代理商： | AN1816 |
AN1816
7
HARDWARE DESIGN
An advantage of having programmable devices present in the system is
that they may be replaced and/or the system may be reconfigured by
adding nodes to the bus and the system will automatically reconfigure
itself at the next power up.
Pre-programmed
Devices
Slaves with pre-programmed addresses do not require a bus switch. On
power-up the stored pre-programmed address becomes the slave
address. However, pre-programmed devices must still receive an
Initialisation Command and reply with an Initialisation Response before
responding to any other bus commands.
HARDWARE DESIGN
Figure 8 Top Level DSI System Connections
Several ICs are used in the development of the system :
Master board
–
HC912B32
–
MC68HC55 SPI Peripheral
–
MC33790 Bus Transceiver
Slave board
–
evaluation slave device, the BEM IC
DSI0O
GND
DSI1O
GND
MC33790 Bus Transceiver
CLK
DI
DO
CS*
SCLK
CH.0
CH.1
MC68HC55 SPI Peripheral
PWM pin
SCK
MOSI
MISO
I/O PIN
SPI
(master
)
HC912B32 MCU
DSI0F
DSI0S
DSI0R
DSI1F
DSI1S
DSI1R
TWO-WIRE BUS
Signal
Return
G
N
D
B
U
S
I
N
B
U
S
O
U
T
Slav
Master Board
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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