MEC1404 Datasheet, PDF (531/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

43.23 Serial Peripheral Interface (SPI) Timings
FIGURE 43-27: SPI CLOCK TIMING
MEC140X/1X
Tr
Tf
SPI_CLK
Th
Tl
Tp
TABLE 43-28: SPI CLOCK TIMING PARAMETERS
NAME
DESCRIPTION
MIN
Tr
Tf
Th/Tl
SPI Clock Rise Time. Measured
from 10% to 90%.
SPI Clock Fall Time. Measured
from 90% to 10%.
SPI Clock High Time/SPI Clock
Low Time
40% of
SPCLK
Period
Tp
SPI Clock Period – As selected 20.8
by SPI Clock Generator
Register
TYP
50% of
SPCLK
Period
MAX
3
3
60% of
SPCLK
Period
5,333
UNITS
ns
ns
ns
NOTE
Note 43-
20
Note 43-
20
ns
Note 43-20 Test conditions are as follows: output load is C_L=30pF, pin drive strength setting is 4mA and slew
rate setting is slow.
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DS00001956D-page 531