CRTOUCH Datasheet, PDF (29/68 Pages) Freescale Semiconductor, Inc – Capacitive and Resistive Touch Sensing Application Specific IC.

Memory Map and Registers Description
Table 8. Resistive touch sense status register map (continued)
Name
FIFO Pressure value
coordinate LSB
UART baudrate MSB
Register Incremental
address Address
0x0F
0x10
Default Value
0x00
0x10
0x11
0x01
UART baudrate MID
UART baudrate LSB
0x11
0x12
0x12
0x13
0xC2
0x00
Device Identifier Register 0x13
0x14
0x12
Slide displacement
0x14
0x15
0x00
Rotate angle
0x15
0x16
0x00
Zoom size
0x16
0x20
0x00
Valid Range
0x00 — 0xFF
0x00 — 0x01
0x00 — 0xFF
0x00 — 0xFF
—
0x00 — 0xFF
0x00 — 0xFF
0x00 — 0xFF
Comment
FIFO Pressure value
coordinate LSB
UART baud rate MSB
byte
UART baud rate MID byte
UART baud rate LSB
byte
Identifies mask set of the
device. Increments with
versions of the device.
Reports how many steps
the user displaced since
the initial touch
Reports the total angle of
the rotate motion since
the initial touch
Reports how much zoom
has been exercised by
the user
1.Incremental address when pressure detection is disabled.
2.Incremental address when pressure detection is enabled.
Table 9. Capacitive Touch Status registers
Name
Register Incremental
Address Address
Electrode Status 0x20
0x21
Capacitive Touch 0x21
Faults
Electrode 0
0x22
baseline MSB
Electrode 0
baseline LSB
0x23
Electrode 1
0x24
baseline MSB
Electrode 1
baseline LSB
0x25
Electrode 2
0x26
baseline MSB
Electrode 2
baseline LSB
0x27
0x22
0x23
0x24
0x25
0x26
0x27
0x28
Default
Value
0x00
0x00
0x0000
0x0000
0x0000
Valid Range
Comment
0x00 — 0x0F Each bit represents the current status of an
electrode.
0x00 to 0x01 Shows the faults generated by the system
0x0000 –
0x07FF
Electrode base capacitance. This value may
adjust to changes due to electrical and
environmental noise.
0x0000 –
0x07FF
Electrode base capacitance. This value may
adjust to changes due to electrical and
environmental noise.
0x0000 –
0x07FF
Electrode base capacitance. This value may
adjust to changes due to electrical and
environmental noise.
CRTouch Data Sheet, Rev. 3
Freescale Semiconductor
29