- 20 - 5.7 GPIO3 Part This part contains General Purpose I/O function, external flash interface, and keyboard matrix row in" />
參數(shù)資料
型號: W83L951DG
廠商: Nuvoton Technology Corporation of America
文件頁數(shù): 30/112頁
文件大?。?/td> 0K
描述: IC EMBEDDED CNTRLR 128-LQFP
標準包裝: 90
系列: W83
核心處理器: 8051
芯體尺寸: 8-位
速度: 24MHz
連通性: 主機接口,PS/2,SMBus,UART/USART
外圍設備: PWM,WDT
輸入/輸出數(shù): 104
程序存儲器容量: 64KB(64K x 8)
程序存儲器類型: 閃存
RAM 容量: 2K x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 3.6 V
數(shù)據(jù)轉換器: A/D 8x10b; D/A 2x8b
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 128-LQFP
包裝: 托盤
W83L951DG/W83L951FG
- 20 -
5.7
GPIO3 Part
This part contains General Purpose I/O function, external flash interface, and keyboard matrix row
input. Default function is General Purpose I/O function.
General Purpose I/O Function
Change the value of GPIO 3 data register (GPIO3) and GPIO 3 direction register (GPIOD3) to
determine 8 input/output.
Keyboard Matrix Row Input
Change the value of chip control 2 register bit 3 (Keyboard Scan Function Enable) to enable GP3 key
wakeup interrupt function.
Note: GPIO3 must be set as input when this function is enabled
The sample frequency about KEY Interrupt Mode is a system cycle, trigger for ' Low ' of input of GP3
and only take a sample once (unless input of GP3 return 'High', then enter ‘low'). If signal debounce,
then interrupt may request again.
Internal Flash Access Interface
GPIO30~33: Reserved (Must assign low)
Table 5-8 GPIO3 pin configuration table
SYMBOL
PIN
I/O
FUNCTION
GP37
KR7
CE#
95
I/O16tsh
General Purpose I/O Function
Keyboard Matrix Row Input
Internal Flash Access Interface: Flash chip select enable
GP36
KR6
OE#
96
I/O16tsh
General Purpose I/O Function
Keyboard Matrix Row Input
Internal Flash Access Interface: Flash output enable
GP35
KR5
WE#
97
I/O16tsh
General Purpose I/O Function
Keyboard Matrix Row Input
Internal Flash Access Interface: Flash write enable
GP34
KR4
ALE
98
I/O16tsh
General Purpose I/O Function
Keyboard Matrix Row Input
Internal Flash Access Interface: Address latch enable
GP33
KR3
99
I/O16tsh
General Purpose I/O Function
Keyboard Matrix Row Input
GP32
KR2
100
I/O16tsh
General Purpose I/O Function
Keyboard Matrix Row Input
GP31
KR1
101
I/O16tsh
General Purpose I/O Function
Keyboard Matrix Row Input
GP30
KR0
102
I/O16tsh
General Purpose I/O Function
Keyboard Matrix Row Input
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