CMA3000-D0X Series
5.3.3 SPI AC characteristics
The AC characteristics of the CMA3000 SPI interface are defined in Figure 11 and in Table 10.
TLS1
TCH
TCL
TLS2
TLH
CSB
SCK
THOL
TSET
MOSI
MISO
MSB in
DATA in
LSB in
TVAL1
TVAL2
TLZ
MSB out
DATA out
LSB out
Figure 11. Timing diagram for SPI communication.
Table 10. AC characteristics of SPI communication.
No.
Parameter
Conditions
Symbol
Min
Typ
Max
Unit
Terminal CSB, SCK
Time from CSB (10%) to
TLS1
TLS2
0.80*
ns
ns
1
2
SCK (90%) (1
Tper/2
Time from SCK (10%) to
CSB (90%) (1
0.80*
Tper/2
Terminal SCK
3
4
5
SCK low time
Load capacitance
at MISO < 50 pF
Load capacitance
at MISO < 50 pF
TCL
TCH
0.80*
Tper/2
Tper/2
ns
ns
Tper/2
SCK high time
0.80*
Tper/2
SCK Frequency
fsck =
1/Tper
0.5
MHz
Terminal MOSI, SCK
6
Time from changing MOSI
TSET
Tper/4
Tper/4
ns
ns
(10%, 90%) to SCK (90%)
Data setup time
7
Time from SCK (90%) to
changing MOSI (10%, 90%)
Data hold time
THOL
Terminal MISO, CSB
8
Time from CSB (10%) to
Load capacitance
at MISO < 50 pF
Load capacitance
at MISO < 50 pF
TVAL1
TLZ
Tper/4
Tper/4
ns
ns
stable MISO (10%, 90%)
Time from CSB (90%) to
high impedance state of
MISO (1.
9
Terminal MISO, SCK
10 Time from SCK (10%) to
stable MISO (10%, 90%) (1.
Terminal MOSI, CSB
11 Time between SPI cycles,
CSB at high level (90%)
is SCK period
Load capacitance
at MISO < 50 pF
TVAL2
1.5*Tper/4
ns
ns
TLH
11 * Tper
1)
T
per
5.3.4 I2C AC characteristics
Please, see Phillips Semiconductors, The I2C bus specification, Version 2.1, January 2000, pp. 31-
33.
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