CMA3000-D0X VTI Hamlin, CMA3000-D0X Datasheet - Page 21

• Manufacturer Part Number: CMA3000-D0X
• Description: Cma3000-d0x Series 3-axis Accelerometer
• Manufacturer: VTI Hamlin

5.3.3 SPI AC characteristics
5.3.4
VTI Technologies Oy
www.vti.fi
I
2
C AC characteristics
The AC characteristics of the CMA3000 SPI interface are defined in Figure 11 and in Table 10.
Figure 11. Timing diagram for SPI communication.
Table 10. AC characteristics of SPI communication.
1)
Please, see Phillips Semiconductors, The I
33.
Terminal CSB, SCK
Terminal SCK
Terminal MOSI, SCK
Terminal MISO, CSB
Terminal MISO, SCK
Terminal MOSI, CSB
T
No.
10
11
CSB
SCK
MOSI
MISO
1
2
3
4
5
6
7
8
9
per
is SCK period
Parameter
Time from CSB (10%) to
SCK (90%)
Time from SCK (10%) to
CSB (90%)
SCK low time
SCK high time
SCK Frequency
Time from changing MOSI
(10%, 90%) to SCK (90%)
Data setup time
Time from SCK (90%) to
changing MOSI (10%, 90%)
Data hold time
Time from CSB (10%) to
stable MISO (10%, 90%)
Time from CSB (90%) to
high impedance state of
MISO
Time from SCK (10%) to
stable MISO (10%, 90%)
Time between SPI cycles,
CSB at high level (90%)
T
VAL1
(1
.
T
LS1
(1
(1
MSB in
MSB out
T
Doc.Nr. 8281000.12
T
CH
HOL
(1
.
T
VAL2
Load capacitance
at MISO < 50 pF
Load capacitance
at MISO < 50 pF
Load capacitance
at MISO < 50 pF
Load capacitance
at MISO < 50 pF
Load capacitance
at MISO < 50 pF
T
CL
Conditions
DATA in
DATA out
2
C bus specification, Version 2.1, January 2000, pp. 31-
Symbol
fsck =
1/T
T
T
T
T
T
T
T
T
T
T
VAL1
VAL2
SET
HOL
LS1
LS2
CL
CH
LH
LZ
per
T
SET
11 * T
LSB in
LSB out
0.80*
T
0.80*
T
0.80*
T
0.80*
T
T
T
Min
per
per
per
per
per
per
/2
/2
/2
/2
/4
/4
per
T
T
T
Typ
LS2
per
per
/2
/2
T
LZ
1.5*T
T
CMA3000-D0X Series
LH
T
T
Max
0.5
per
per
/4
/4
per
/4
MHz
Rev. 0.12
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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