ak4184a AKM Semiconductor, Inc., ak4184a Datasheet - Page 20

• Manufacturer Part Number: ak4184a
• Description: Tsc With Keypad Scanner And Gpio Expander
• Manufacturer: AKM Semiconductor, Inc.

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The control command format for accessing the keypad scanner, GPIO, and LED contrast control is described in
10. The sequence of writing to and reading from the registers is shown in
(touch screen command) of the control command is set to zero when assessing these blocks. Refer to
control and read data formats.
1.
2.
MS0947-E-00
DOUT
DOUT
SCLK
DIN
SCLK
DIN
CSN
CSN
Keypad, GPIO, LED Contrast Control
D15
Bits
5:0
0
7
6
Write Operation
Read Operation
Hi-Z
Hi-Z
D14
0
PAGE
ADDR
Name
W/R
1
1
D13
0
2
2
D12
3
3
Write/Read bit
Page bit
Address bit
0
Table 9. Keypad, GPIO, LED Contrast Control Command Format
“0”
0: Write
1: Read
“0”
8
8
D11
W/R Page
W/R Page
0
Control Command
Control Command
9
9
(Table
10
10
(Table
D10
0
11
11
3)
D9
4)
12
12
0
Table 10. Control Command
Figure 11. Write Operation
ADDR[5:0]
ADDR[5:0]
Figure 12. Read Operation
13
13
D8
0
14
14
W/R
D7
15
15
- 20 -
16
16
PAGE
15 14
15 14
D6
17
17
Description
18
18
D5
13
13
19
19
Table
8
8
D4
25
25
12,
7
7
Control Data
Table
26
26
D3
6
6
Read Data
27
27
ADDR[5:0]
5
5
13. The upper MSB byte
D2
28
28
4
4
29
3
29
3
D1
30
30
2
2
Table 4
1
1
31
31
[AK4184A]
D0
2008/04
0
0
32
32
for the
Table
Hi-Z
Hi-Z