Data Sheet

SCK
SSN
MOSI
MISO
D0
D1
X
D0
X
t
2
t
4
t
6
t
7
t
5
t
3
X
T0478-01
CC2541
www.ti.com SWRS110D –JANUARY 2012–REVISED JUNE 2013
SPI AC CHARACTERISTICS
T
A
= –40°C to 85°C, VDD = 2 V to 3.6 V
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Master, RX and TX 250
t
1
SCK period ns
Slave, RX and TX 250
SCK duty cycle Master 50%
Master 63
t
2
SSN low to SCK ns
Slave 63
Master 63
t
3
SCK to SSN high ns
Slave 63
t
4
MOSI early out Master, load = 10 pF 7 ns
t
5
MOSI late out Master, load = 10 pF 10 ns
t
6
MISO setup Master 90 ns
t
7
MISO hold Master 10 ns
SCK duty cycle Slave 50% ns
t
10
MOSI setup Slave 35 ns
t
11
MOSI hold Slave 10 ns
t
9
MISO late out Slave, load = 10 pF 95 ns
Master, TX only 8
Master, RX and TX 4
Operating frequency MHz
Slave, RX only 8
Slave, RX and TX 4
Figure 3. SPI Master AC Characteristics
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