cy8cmbr2044 Cypress Semiconductor Corporation., cy8cmbr2044 Datasheet - Page 15

• Manufacturer Part Number: cy8cmbr2044
• Description: Capacitive Button Controllers
• Manufacturer: Cypress Semiconductor Corporation.

Deep Sleep Mode
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Additional Components to Enable Advanced Features
Response Time
Response time is the minimum amount of time the button should be touched for the device to detect as valid button press.
Document Number: 001-57451 Rev. *C
First button press
Consecutive button press after first button press
Sl. No
To enable the deep sleep mode, the hardware configuration
pin ScanRate/Sleep should be connected to the master device
as shown in
ScanRate/Sleep pin should be connected to V
to go into deep sleep.
In deep sleep mode, all blocks are turned off and the device
power consumption is 0.1 µA.
There is no CapSense scanning in deep sleep mode.
ScanRate/Sleep pin should be pulled low for the device to wake
up from deep sleep.
1
2
3
4
Low power sleep and
deep sleep
Toggle/FSS
Delay Off
Sensor auto reset
Figure 9
Feature
CY8CMBR2044
on page 12.
ScanRate/Sleep
Condition
Figure 12. ScanRate/Sleep Pin Connection to Enable Deep Sleep Mode
Resistors
required
1
1
1
1
Deep sleep is controlled by a master device. When the device comes out of deep sleep,
it enters into low power sleep mode based on settings. Resistor is not required if both
features are not used.
To enable both the features only one resistor is required. Resistor is not required if both
features are not used.
Resistor is not required if the feature is not used.
Resistor is not required if the feature is not used.
DD
for the device
External Res R
Scan rate value + 20. For scan rate value, see
80
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When device comes out of deep sleep mode, the CapSense
system is reinitialized. Typical time for reinitialization is 8 ms.
Any button press within this time is not reported.
After the device comes out of deep sleep, the device operates
in low power sleep mode.
If the ScanRate/Sleep pin is pulled high at power on, then the
device does not go to deep sleep immediately. The device goes
to deep sleep after initializing all internal blocks and scanning
all sensors once.
If the ScanRate/Sleep pin is pulled high at power on, then the
scan rate is calculated when the device is taken out of Deep
Sleep by the master.
Notes
Response time (in ms)
ScanRate/Sleep Pin
Host Pin controlling
HOST
CY8CMBR2044
Table 9
Page 15 of 26
on page 13.
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