CY8C20121 CYPRESS [Cypress Semiconductor], CY8C20121 Datasheet - Page 18

• Manufacturer Part Number: CY8C20121
• Description: CapSense Express-One Button and Two Button Capacitive Controllers
• Manufacturer: CYPRESS [Cypress Semiconductor]

7.20 DEVICE_ID
DEVICE_ID: 7Ah
This register contains the device and product ID. The device and product ID corresponds to “xx” in CY8C201xx.
7.21 DEVICE_STATUS
DEVICE_STATUS: 7Bh
This register contains the device status.
Document Number: 001-53516 Rev. **
Bit
7:0
Bit
7:6
5
4
3
1
0
Access: FD
Access: FD
Access: FD
1/2 Button
Bit Name
1 Button
Bit Name
2 Button
Bit Name
Device ID Register
Device Status Register
IRES
Load_FD
No_NVM_Wr
CSE
DIGE
Name
DEV_ID [7:0]
Name
Ip_Volt [1:0]
7
7
7
Ip_Volt[1:0]
R : 00
6
6
6
IRES
R: 0
5
5
5
PRELIMINARY
These bits contain the device and product ID.
Supply voltage is automatically detected and these bits are set accordingly.
When set to ‘1’, this bit indicates that an internal reset occurred.
0
1
This bit indicates whether factory defaults are loaded during power up.
0
1
When set to ‘1’, this bit indicates that the supply voltage applied to the device Is too
low for a write to nonvolatile memory operation, and no write is performed. This bit
must be checked before any Store or Write POR command.
This bit indicates whether CapSense function is enabled or disabled.
0
1
This bit indicates whether GP Output function is enabled or disabled.
0
1
Load_FD
Description
Description
R : 0
4
CY8C20121
CY8C20111
4
4
Ip_Volt[1:0]
indicates the last system reset was not internal reset
indicates the last system reset was internal reset
User default configuration is loaded during power up
Factory default configuration is loaded during power up
Functionality of CapSense block is disabled
Functionality of CapSense block is enabled
Functionality of Digital output block is disabled
Functionality of Digital output block is enabled
DEV_ID[7:0]
DEV_ID[7:0]
Part No
00
01
10
11
R: 11
R: 21
No_NVM_Wr
R: 0
3
3
3
Supply Voltage
Device/Product ID
Reserved
3.3
2.7
5
21
11
2
2
CY8C20111, CY8C20121
2
1
1
CSE
R: 0
1
DIGE
0
0
R: 0
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