CY8C20111 View Datasheet(PDF) - Cypress Semiconductor
Part Name
Description
MFG CO.
CY8C20111
Cypress Semiconductor
'CY8C20111' PDF : 34 Pages View PDF
CY8C20111, CY8C20121
CS_FINGER_TH_x
Finger Threshold Registers
CS_FINGER_TH_0: 66h
CS_FINGER_TH_1: 67h (Not available in 1 Button)
1/2 Button
7
6
5
4
3
2
1
0
Access: FD
RW: 64
Bit Name
FT[7:0]
This register sets the finger threshold value for CapSense inputs. Possible values are 3 to 255. This parameter should be configured
individually for each CapSense inputs.
This register should be set after setting 0x07, 0x50, and 0x51 registers.
Bit
Name
[7:0]
FT [7:0]
Description
These bit set the finger threshold for CapSense inputs.
CS_IDAC_x
IDAC Setting Registers
CS_IDAC_0: 70h CS_IDAC_1: 71h (Not available in 1 Button)
1/2 Button
7
6
5
4
3
2
1
0
Access: FD
RW: 0A
Bit Name
IDAC[7:0]
The IDAC register controls the sensitivity of the CapSense algorithm. This register is used to tune the CapSense input for specific
design or overlays. Decreasing the value of this register increases the sensitivity of the CapSense buttons and vice versa. Decreasing
the value of IDAC increases noise and vice versa.
Possible values are 1 to 255. If the value is set to 0 then the value is reset to default value 10.
The recommended value is greater than 4. Setting value ď‚Ł 4 creates excessive amount of noise.
This register should be set after setting 0x07, 0x50, and 0x51 registers.
Bit
Name
[7:0]
IDAC [7:0]
Description
These bit set the IDAC values.
I2C_ADDR_LOCK
I2C Address Lock Registers
I2C_ADDR_LOCK: 79h
1/2 Button
7
6
5
4
3
2
1
0
Access: FD
WPR: 0
Bit Name
I2CAL
This register is used to unlock and lock the I2C address register (7Ch) access. The device I2C address should be modified by writing
new address to register 7Ch after unlocking the access using this register. Write to the 7C register during the locked state does not
have any effect and the new address take effect only after the access is locked.
To lock or unlock the I2C AL bit, the following three bytes must be written to register 79h:
â– unlock I2CAL: 3Ch A5h 69h
â– lock I2CAL: 96h 5Ah C3h
Reading the I2CAL bit from register 79h indicates the current access state.
Bit
Name
0
I2CAL
Description
This bit gives the lock/unlock status of I2C address.
0 Unlocked
1 Locked
Document Number: 001-53516 Rev. *H
Page 20 of 44
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