AK4186 Datasheet, PDF (17/33 Pages) Asahi Kasei Microsystems – Low Power Touch Screen Controller with I2C Interface

[AK4186]
Bits
Name
D7
PANEL
D6
Reserved
D5-D4 SLEEP1-0
D3
Reserved
D2
Reserved
D1
Reserved
D0
PD0
Description
Panel type Selection
0: 4-wire (default)
1: 5-wire
Must write “0”
Sleep Command bits (refer to “■ Sleep Mode”)
00: Normal Mode (default)
01: Sleep Mode 1 (PENIRQN disabled and output “H”. Touch Panel is open.)
10: Sleep Mode 2 (PENIRQN disabled and open. Touch Panel is open.)
11: Reserved
Must write “0”
Must write “0”
Must write “0”
Power-down Mode (refer to “■ Power-down Control”)
0: Auto Power-down Mode (default)
1: Driver ON Mode
Table 7. Setup Command description
SLEEP1-0, PD0 bits can be written during a sequential measurement but PANEL bit will not be changed.
2. Sequence Command Configuration
Addr
02H
Register Name
Sequence Command
D7 D6
D5
D4
D3
D2
0 SEQM2 SEQM1 SEQM0 COUNT INTERVAL2
Table 8. Sequence Command Register Format
D1
INTERAVAL1
D0
INTERVAL0
The AK4186 starts A/D conversion in sequence mode by setting the COUNT, SEQM2-0, INTERVAL2-0 bits of the
register address to 02H. The AK4186 makes six or ten measurements by setting the COUNT bit. The results are used to
calculate the average value, discarding the minimum and maximum values, and the result sets the data register of
sequence mode. If the address 02H is set again during a sequential measurement, this setting is ignored and the AK4186
continues the measurement. The master executes the register read operation to read the measurement data of sequence
mode after confirming the PENIRQN pin turns to “H” (Data Available).
Bits
D7
D6-D4
D3
D2-D0
Name
Reserved
SEQM2-0
COUNT
INTERVAL2-0
Description
Must write “0”
Sequence Mode
000: X → Y → Z1 → Z2 Scan (only 4-wire Touch Screen) (default)
001: X → Y Scan
010: X Scan
011: Y Scan
100: Z1 → Z2 Scan (only 4-wire Touch Screen)
101: Reserved
110: A-IN (only 4-wire Touch Screen)
111: Reserved
A/D Conversion count
0: 6 times A/D Conversion (default)
1: 10 times A/D Conversion
Sampling interval times.
000: 0μs (default)
001: 5μs
010: 10μs
011: 20μs
100: 50μs
101: 100μs
110: 200μs
111: 500μs
Table 9. Sequence Command description
MS1068-E-04
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2011/03