CY8CMBR2044_12 CYPRESS [Cypress Semiconductor], CY8CMBR2044_12 Datasheet - Page 14

• Manufacturer Part Number: CY8CMBR2044_12
• Manufacturer: CYPRESS [Cypress Semiconductor]

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. *E
First button press
Consecutive button press after first button press
S.No.
To enable the deep sleep mode, the hardware configuration
pin ScanRate/Sleep should be connected to the master device
as shown in
Host controller should pull the pin to V
into deep sleep.
The Host controller output pin should be in Strong drive mode,
so that the ScanRate/Sleep pin is not left floating.
In deep sleep mode, all blocks are turned off and the device
current consumption is approximately 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
Feature
CY 8CMBR 2044
13.
ScanRate/Sleep
Condition
Figure 13. ScanRate/Sleep Pin Connection to Enable Deep Sleep Mode
Resistors
required
DD
1
1
1
1
for the device to go
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.
External Resis tor R
(Controls S can Rate)
Button Scan rate value + 20. For button scan rate value, see
Table 15
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 touch 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 buttons once.
If the ScanRate/Sleep pin is pulled high at power on, then the
button scan rate is calculated when the device is taken out of
Deep Sleep by the master.
in Appendix.
Digital Output pin
(Controls Deep Sleep)
Response time (in ms)
Notes
HOST
CY8CMBR2044
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