ak4184 AKM Semiconductor, Inc., ak4184 Datasheet - Page 27

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

Addr
10H
L
The GPPU register determines the output pin type - either CMOS or Open drain. This register is valid for pins
configured as outputs (IO bit = “1” in Table 28). Pull-up resistors on GP0 to GP7 pins should be connected to
(IOVDD+0.3) V or lower voltage when the PUx bit is set to “1”.
L
The GPSR register determines the state of pins which are either pull-down or Hi-Z. This register is valid for pins
configured as inputs (IO bit = “0”).
L
The state of each GPIO pin can be determined by reading this register (GPLR). Each bit corresponds to one pin. Use
the GPLR read-only registers to determine the current level of a certain pin irrespective of the programmed pin
direction. For the upper eight bits, the read returns zero.
MS0603-E-00
Addr
12H
Addr
13H
GPIO Pin Pull-up Register (PAGE 1 )
GPIO Pin State Register (PAGE 1)
GPIO Pin Level Register (PAGE 0)
Name
GPLR
15:8
15:8
Bits
Bits
7:0
7:0
Name
GPPU
D15
Name
GPSR
0
Name
Name
GPD
PS
0
D14
15:8
Bits
0
7:0
D15
PU7
D15
PS7
GPIO Pin state select
0 = GPIO Pull-down (Rgp=1M typ.) state (default)
1 = GPIO pin Hi-Z state
Reserved
Reserved
GPIO Pin Level bits for GPIO pins
0 = Pin state is low
1 = Pin state is high
D13
0
D14
PU6
Name
D14
PU
PS6
D12
0
D13
PU5
D13
PS5
Table 29. GPIO Pin Pull-up Register Format
D11
GPIO Pullup register select
0 = GPIO CMOS outputs (default)
1 = GPIO Open drain outputs
Reserved
Table 33. GPIO Pin Level Register Format
Table 31. GPIO Pin State Register Format
0
PU4
D12
Table 34. GPIO Pin Level Register
Table 32. GPIO Pin state Register
Table 30. GPIO Pull-up Register
D12
PS4
D10
0
D11
PU3
D11
D9
PS3
0
D10
PU2
D8
0
D10
PS2
27
PU1
GPD7
D9
D7
Description
Description
Description
PS1
D9
PU0
D8
GPD6
D6
PS0
D8
D7
0
GPD5
D7
D5
0
D6
0
D6
0
GPD4
D5
D4
0
D5
0
D4
0
GPD3
D4
D3
0
D3
0
D3
0
GPD2
D2
D2
0
D2
0
2007/04
GPD1
D1
0
[AK4184]
D1
D1
0
D0
D0
0
0
GPD0
D0