Datasheet

© 2008 Microchip Technology Inc. DS22060B-page 13
MCP413X/415X/423X/425X
TABLE 1-3: SPI REQUIREMENTS FOR SDI/SDO MULTIPLEXED (READ OPERATION ONLY)
(2)
Characteristic Symbol Min Max Units Conditions
SCK Input Frequency F
SCK
—250kHzV
DD
= 2.7V to 5.5V
CS
Active (V
IL
or V
IHH
) to SCK↑ input TcsA2scH 60 — ns
SCK input high time TscH 1.8 — us
SCK input low time TscL 1.8 — ns
Setup time of SDI input to SCK↑ edge T
DIV2scH 40 — ns
Hold time of SDI input from SCK↑ edge TscH2
DIL40—ns
CS Inactive (V
IH
) to SDO output hi-impedance TcsH2DOZ — 50 ns Note 1
SDO data output valid after SCK↓ edge TscL2
DOV—1.6us
SDO data output valid after
CS
Active (V
IL
or V
IHH
)
TssL2doV — 50 ns
CS
Inactive (V
IH
) after SCK↓ edge TscH2csI 100 — ns
Hold time of CS Inactive (V
IH
) to
CS
Active (V
IL
or V
IHH
)
TcsA2csI 50 — ns
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.