CapSense Express Controllers Registers TRM, Document No. 001-91082 Rev. *E 24
Register Mapping
1.5 Register Map
The CY8CMBR3xxx family features an I
2
C configurable register map. The CY8CMBR3xxx registers are divided into three
categories, as the following table shows.
The CY8CMBR3xxx devices feature a safe register map update mechanism to overcome configuration data corruption, which
can occur due to power failure during execution of “Save” command or any other spurious events.
If the configuration data is corrupted when the device is saving data, on the next reset, the devices reconfigure themselves to
the last known valid configuration. If there is no valid configuration saved by user, the devices load the factory default config
-
uration.
The following table provides all registers available in CY8CMBR3xxx family. Refer to Factory Default Values on page 6 for
details on which register is applicable to which device.
CY8CMBR3xxx Registers
Register Cate-
gory
Register Map
Address range
Description
Configuration
Registers
0x00-0x7E These registers contain the configuration data for the CY8CMBR3xxx controllers. A host
can write into these registers and save the data to non-volatile memory by writing to
CTRL_CMD command register. Note that the new configuration takes effect only after the
configuration is saved to non-volatile memory and the device is reset.
Command
Registers
0x80-0x87 These registers accept commands from host. Any command written to these register is
executed within T
I2C_LATENCY_ MAX
from the I
2
C acknowledgement of the command.
Refer to
CY8CMBR3xxx datasheet for value of TI2C_LATENCY_ MAX.
Status Registers 0x88-0xFB These are read only registers and indicate the status of command execution, system
diagnostics and sensor data.
Register Name Address
SENSOR_EN 0x00
FSS_EN 0x02
TOGGLE_EN 0x04
LED_ON_EN 0x06
SENSITIVITY0 0x08
SENSITIVITY1 0x09
SENSITIVITY2 0x0a
SENSITIVITY3 0x0b
BASE_THRESHOLD0 0x0c
BASE_THRESHOLD1 0x0d
FINGER_THRESHOLD2 0x0e
FINGER_THRESHOLD3 0x0f
FINGER_THRESHOLD4 0x10
FINGER_THRESHOLD5 0x11
FINGER_THRESHOLD6 0x12
FINGER_THRESHOLD7 0x13
FINGER_THRESHOLD8 0x14
FINGER_THRESHOLD9 0x15
FINGER_THRESHOLD10 0x16
FINGER_THRESHOLD11 0x17
FINGER_THRESHOLD12 0x18
FINGER_THRESHOLD13 0x19
FINGER_THRESHOLD14 0x1a
To Next Page
Loading...
Need help?
General
