PRELIMINARY
SF104-P01
SF3013M Fingerprint Image Sensor Module User Manual
Page - 30
SPI timing parameters
SYMBOL PARAMETER
NOTE
MIN.
TYP.
MAX. UNITS
f
CK
Clock frequency
1
18
MHz
t
RST
Reset time
1
50
ns
t
RD
Rise time for digital inputs
2
2
ns
t
FD
Fall time for digital inputs
2
2
ns
f
SPI_SCK
Frequency for SPI clock.
1
0
f
CK
MHz
t
SCKL
Part of SPI_CK clock period,
during which SPI_CK is low.
1 23
ns
t
SCKH
Part of SPI_CK clock period,
during which SPI_CK is high.
1 23
ns
t
CSCKF
Time from falling edge on
SPI_CK to edge on SPI_CS_N
1 8
ns
t
CSCKR
Time from edge on SPI_CS_N to
rising edge on SPI_CK
1 8
ns
t
DSU
Setup time for data before rising
edge of SPI_CK
2 6
ns
t
DH
Hold time for data after rising
edge of SPI_CK
2 6
ns
t
SCKD
Delay from falling clock to data
available.
2 1
3
ns
t
SSU
Delay from SPI_CS_N low to
SPI_DI mode change.
2 1
3
ns
Note 1: Estimated value
Note 2: Simulated value
