參數(shù)資料
型號: HMS30C2000
英文描述: [Application Specific Solution Product]
中文描述: [專用解決方案產(chǎn)品]
文件頁數(shù): 113/161頁
文件大?。?/td> 973K
代理商: HMS30C2000
HMS30C7110
2003 MagnaChip Semiconductor Ltd. All Rights Reserved
Version 1.5
113
2.9.
GPIO
The HMS30C7110 integrates a GPIO module that supports 21 GPIO (General Purpose Input /
Output) ports. 3 GPIO out of 21 are dedicated to GPIO feature and others are muxed to other
features. Each port is configurable with input or output mode. The initial modes of all GPIO pins
are set to input, so when to use in output mode, it is highly recommended to pull-up or pull-down
the ports to prevent annoying vibration caused by temporary high impedance state during reset and
initialization.
The GPIO is capable of interrupting the MCU when input signal triggers, and it supports one of the
four kinds of interrupt source signal. Level trigger high/low and edge trigger rising/falling signal.
The GPIO is fully configurable through a set of control registers. Complete descriptions of these
registers are given in the Register Section.
2.9.1.
User Accessible Registers (Base = 0x1820_0000)
This section describes all base, control and status registers inside the GPIO module. The address
field indicates a relative address in hexadecimal. Width specifies the number of bits in the register
and access specifies the valid access types to that register. ‘RW’ stands for read and write access and
‘RO’ for read only access. A ‘C’ appended to ‘RW’ or ‘RO’ indicates some or all of the bits can be
cleared after writing ‘1’ to the corresponding bit.
Table 2.75 Registers for GPIO
Name
Address Width
Access
Description
GPO Data
0x00
9
RW
GPO data to I/O pins
GPI Data
0x04
12
RO
GPI data from I/O pins
GPIO Direction
0x08
9
RW
Direction for I/O pins
INT SRC
0x0c
16
RW
Interrupt Source
INT ENABLE
0x10
16
RW
Interrupt enable
INT MODE
0x14
16
RW
Detection mode of interrupt
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