UR7HCTS2-S840 查看數據表（PDF） - Semtech Corporation
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UR7HCTS2-S840 Datasheet PDF : 16 Pages
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PROTOCOLS FOR THE UR7HCTS2-S840 IN SPI MODE (CON’T)
SPI Communication Timing Parameters
Symbol
t1
t2
t2’
t3
t4
Description
Min
_ATN low to _SS low
_SS low to first clock
50
(_SS toggles for every package)
_ATN low to first clock
50
(_SS low)
Last clock of transmitted
50
byte to next byte’s first clock
Last byte TX finish to
_ATN to high
Max
10
5000
5000
5000
30
Units
ms
us
us
us
us
t2
_ATN
_SS
SCLK
SDATA
1st 2nd
Byte Byte
t3
Last
Byte
t4
Figure 3: SPI Packet Transmission Timing: (_SS low always).
Copyright Semtech 2000-2001
10
DOC7-TS2-S840-DS-102
www.semtech.com
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