參數(shù)資料
型號： AK4184
廠商： Asahi Kasei Microsystems Co.,Ltd
英文描述： TSC with Keypad Scanner and GPIO Expander
中文描述： 臺糖與鍵盤掃描儀和GPIO擴(kuò)展
文件頁數(shù)： 27/36頁
文件大?。?/td> 597K
代理商： AK4184
[AK4184]
MS0603-E-00
2007/04
27
■
GPIO Pin Pull-up Register (PAGE 1 )
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”.
Addr
Name
D15
D14
D13
D12
D11
D10
12H
GPPU
PU7 PU6
PU5 PU4
PU3
PU2
Table 29. GPIO Pin Pull-up Register Format
D9
PU1
D8
PU0
D7
0
D6
0
D5
0
D4
0
D3
0
D2
0
D1
0
D0
0
Bits
15:8
Name
PU
Description
GPIO Pullup register select
0 = GPIO CMOS outputs (default)
1 = GPIO Open drain outputs
Reserved
Table 30. GPIO Pull-up Register
7:0
■
GPIO Pin State Register (PAGE 1)
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”).
Addr
Name
D15
D14
D13
D12
D11
13H
GPSR
PS7
PS6
PS5
PS4
PS3
Table 31. GPIO Pin State Register Format
D10
PS2
D9
PS1
D8
PS0
D7
0
D6
0
D5
0
D4
0
D3
0
D2
0
D1
0
D0
0
Bits
15:8
Name
PS
Description
GPIO Pin state select
0 = GPIO Pull-down (Rgp=1M
typ.) state (default)
1 = GPIO pin Hi-Z state
Reserved
Table 32. GPIO Pin state Register
7:0
■
GPIO Pin Level Register (PAGE 0)
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.
Addr Name D15 D14 D13 D12 D11 D10
D9
D8
10H
GPLR
0
0
0
0
0
0
0
0
Table 33. GPIO Pin Level Register Format
D7
GPD7
D6
GPD6
D5
GPD5
D4
GPD4
D3
GPD3 GPD2 GPD1
D2
D1
D0
GPD0
Bits
15:8
7:0
Name
0
GPD
Description
Reserved
GPIO Pin Level bits for GPIO pins
0 = Pin state is low
1 = Pin state is high
Table 34. GPIO Pin Level Register
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