W90N740CDG Nuvoton Technology Corporation of America, W90N740CDG Datasheet - Page 176

• Manufacturer Part Number: W90N740CDG
• Description: IC MCU ARM7 TDMI 176-LQFP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: W90r

Specifications of W90N740CDG

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 80MHz
• Connectivity: EBI/EMI, Ethernet, UART/USART, USB
• Peripherals: DMA, POR, WDT
• Number Of I /o: 21
• Program Memory Type: ROMless
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 1.62 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 176-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

GPIODIx: GPIO status corresponding to bit x
The GPIODIx indicates the status of each GPIO pin regardless of its operation mode.
Debounce Control Register (DEBNCE_CTRL)
DBCLKSEL [6:4]: De-bounce Clock Rate Selector
These three bits are used to select the clock rate for de-bouncer circuit. The relationship between the
system clock HCLK and the de-bounce clock TCLK_BUN is as follows:
DBE3 [3]: De-bouncer Circuit Enable for GPIO20
0 = De-bounce function is disabled
1 = De-bounce function is enabled
RESERVED
GPIODI15
DEBNCE_CTRL
GPIODI7
REGISTER
31
23
15
31
23
15
7
7
RESERVED
GPIODI14
GPIODI6
30
22
14
30
22
14
6
6
0xFFF8.3010
ADDRESS
DBCLKSEL
GPIODI13
GPIODI5
29
21
13
29
21
13
5
5
TCLK_BUN = HCLK / 2
GPIODI20
GPIODI12
R/W
R/W
GPIODI4
28
20
12
28
20
12
4
4
RESERVED
RESERVED
RESERVED
RESERVED
De-bounce Control Register
- 173 -
W90N740CD/W90N740CDG
GPIODI11
GPIODI19
GPIODI3
DBE3
27
19
11
27
19
11
DESCRIPTION
3
3
DBCLKSEL
Publication Release Date: Aug. 18, 2005
GPIODI18
GPIODI10
GPIODI2
DBE2
26
18
10
26
18
10
2
2
GPIODI17
GPIODI9
GPIODI1
DBE1
25
17
25
17
9
1
9
1
0x0000.0000
RESET VALUE
GPIODI16
Revision A6
GPIODI8
GPIODI0
DBE0
24
16
24
16
8
0
8
0