AT77C104B-CB09YV Atmel, AT77C104B-CB09YV Datasheet - Page 26

• Manufacturer Part Number: AT77C104B-CB09YV
• Manufacturer: Atmel

Specifications of AT77C104B-CB09YV

• Lead Free Status / RoHS Status: Compliant

12.2
12.2.1
Figure 12-1. Writing into an Internal Register
Note:
26
MOSI
MISO
SCK
SSS
Communication Speed
The break on SCK on the SPI chronogram has been added for better comprehension only. In a real application, SCK can be
continuous.
AT77C104B
Example for the MODECTRL Register
1
x
Writing into MODECTRL Register Requested
x
0
To reduce consumption, the control interface’s communication speed is set to the lowest possi-
ble speed and depends on the host’s configuration.
To communicate with “fast” controllers, the sensor’s communication speed can be set to 200
kbits/s.
Figure 10 represents a typical writing sequence into an internal register (MODECTRL register in
this example).
See Appendix B for flowchart.
0
x
0
x
0
x
1
x
x
x
x
x
x
0
New Data to be Written into MODECTRL Register
x
0
(Navigation and Click Mode)
1
x
1
x
0
x
x
0
x
0
5347F–BIOM–3/08
x
0