W90N740CDG Nuvoton Technology Corporation of America, W90N740CDG Datasheet - Page 51

• 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: -

tRCD [10:8] ：SDRAM bank 0/1, /RAS to /CAS delay (see Fig 7.3.4)
tRDL [7:6] ：SDRAM bank 0/1, Last data in to pre-charge command (see Fig 7.3.5)
31
23
15
7
0
0
0
0
1
1
1
1
0
0
1
1
tRDL
tRCD [10:8]
tRDL [7:6]
30
22
14
6
0
0
1
1
0
0
1
1
RESERVED
29
21
13
5
0
1
0
1
0
1
0
1
0
1
0
1
28
20
12
tRP
4
RESERVED
RESERVED
- 48 -
W90N740CD/W90N740CDG
27
19
11
3
MCLK
MCLK
26
18
10
2
1
2
3
4
5
6
7
8
1
2
3
4
tRCD
tRAS
25
17
9
1
24
16
8
0