MCP414X/416X/424X/426X
TABLE 1-3:
SPI REQUIREMENTS FOR SDI/SDO MULTIPLEXED (READ OPERATION ONLY)
(2)
Characteristic
Symbol
Min
Max Units
Conditions
—
250 kHz V
DD
= 2.7V to 5.5V
SCK Input Frequency
F
SCK
TcsA2scH
60
—
ns
CS Active (V
IL
or V
IHH
) to SCK↑ input
SCK input high time
TscH
1.8
—
us
SCK input low time
TscL
1.8
—
ns
40
—
ns
Setup time of SDI input to SCK↑ edge
T
DI
V2scH
40
—
ns
Hold time of SDI input from SCK↑ edge
TscH2
DI
L
CS Inactive (V
IH
) to SDO output hi-impedance
TcsH2
DO
Z
—
50
ns
—
1.6
us
SDO data output valid after SCK↓ edge
TscL2
DO
V
TssL2doV
—
50
ns
SDO data output valid after
CS Active (V
IL
or V
IHH
)
TscH2csI
100
—
ns
CS Inactive (V
IH
) after SCK↓ edge
TcsA2csI
50
—
ns
Hold time of CS Inactive (V
IH
) to
CS Active (V
II
or V
IHH
)
Note 1:
This specification by design
2:
This table is for the devices where the SPI’s SDI and SDO pins are multiplexed (SDI/SDO) and a Read
command is issued. This is NOT required for SDI/SDO operation with the Increment, Decrement, or Write
commands. This data rate can be increased by having external pull-up resistors to increase the rising
edges of each bit.
©
2008 Microchip Technology Inc.
DS22059B-page 13
MICROCHIP [ MICROCHIP TECHNOLOGY ]
