MCP413X/415X/423X/425X
(2)
TABLE 1-3:
SPIREQUIREMENTSFORSDI/SDOMULTIPLEXED(READOPERATIONONLY)
Characteristic
Symbol
Min
Max Units
Conditions
SCK Input Frequency
FSCK
—
60
1.8
1.8
40
40
—
250 kHz VDD = 2.7V to 5.5V
CS Active (VIL or VIHH) to SCK↑ input
SCK input high time
TcsA2scH
TscH
—
—
ns
us
SCK input low time
TscL
—
ns
Setup time of SDI input to SCK↑ edge
Hold time of SDI input from SCK↑ edge
CS Inactive (VIH) to SDO output hi-impedance
SDO data output valid after SCK↓ edge
SDO data output valid after
TDIV2scH
TscH2DIL
TcsH2DOZ
TscL2DOV
TssL2doV
—
ns
—
ns
50
1.6
50
ns Note 1
—
us
ns
—
CS Active (VIL or VIHH
)
CS Inactive (VIH) after SCK↓ edge
Hold time of CS Inactive (VIH) to
TscH2csI
TcsA2csI
100
50
—
—
ns
ns
CS Active (VIL or VIHH
)
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.
DS22060B-page 13
MICROCHIP [ MICROCHIP ]
