8 Channel Capacitive Touch Sensor with 2 LED Drivers
Datasheet
Table 2.2 Electrical Specifications (continued)
VDD = 3V to 3.6V, TA = 0°C to 85°C, all Typical values at TA = 27°C unless otherwise noted.
CHARACTERISTIC
SYMBOL
MIN
TYP
MAX
UNIT
CONDITIONS
BC-Link Timing
Clock Period
Data Hold Time
Data Setup Time
Clock Duty Cycle
tCLK
tHD:DAT
tSU:DAT
Duty
250
0
ns
ns
ns
%
30
40
Data must be valid before clock
50
60
SPI Timing
Clock Period
tP
250
ns
ns
ns
Clock Low Period
Clock High Period
tLOW
tHIGH
tRISE
0.4 x tP
0.4 x tP
0.6 x tP
0.6 x tP
Clock Rise / Fall
time
/
0.1 x tP
10
ns
tFALL
Data Output Delay
Data Setup Time
Data Hold Time
tD:CLK
tSU:DAT
tHD:DAT
ns
ns
ns
20
20
SPI_CS# to
SPI_CLK setup time
tSU:CS
tWAKE
0
ns
us
Wake Time
10
20
SPI_CS# asserted to CLK assert
Note 2.5 The ALERT pin will not glitch high or low at power up if connected to VDD or another
voltage.
Note 2.6 The SMCLK and SMDATA pins will not glitch low at power up if connected to VDD or
another voltage.
Revision 1.32 (01-05-12)
SMSC CAP1128
DATA1S6HEET
SMSC [ SMSC CORPORATION ]
