ak4184 AKM Semiconductor, Inc., ak4184 Datasheet - Page 20

• Manufacturer Part Number: ak4184
• Description: Tsc With Keypad Scanner And Gpio Expander
• Manufacturer: AKM Semiconductor, Inc.

L
The control command format for accessing the keypad scanner, GPIO, and LED contrast control is described in Table
10.The sequence of writing to and reading from the registers is shown in Table 12, Table 13. The upper MSB byte
(touch screen command) of the control command is set to zero when assessing these blocks. Refer to Table 4 for the
control and read data formats.
1.
2.
MS0603-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
Name
ADDR
W/R
1
1
D13
0
2
2
D12
x x x x x x x x x x x
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3
3
Write/Read bit
0: Write
1: Read
Page bit (Table 3)
Address bit (Table 4)
0
Table 9. Keypad, GPIO, LED Contrast Control Command Format
“0”
“0”
8
8
D11
W/R Page
W/R Page
Control Command
Control Command
0
9
9
10
10
D10
0
11
11
D9
12
12
0
Table 10. Control Command
Figure 10. Write Operation
ADDR[5:0]
ADDR[5:0]
Figure 11. 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
x x x x x x x x x x x
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8
8
D4
25
25
7
7
Control Data
26
26
D3
6
6
Read Data
27
27
ADDR[5:0]
5
5
D2
28
28
4
4
29
3
29
3
D1
30
30
2
2
1
1
31
31
D0
2007/04
0
0
32
32
[AK4184]
Hi-Z
Hi-Z