W90N740CDG Nuvoton Technology Corporation of America, W90N740CDG Datasheet - Page 27

• 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: -

Table 7.2.9 and Table 7.2.10
Using little-endian and word access, Program/Data path between register and external memory
WA = Address whose LSB is 0, 4, 8, C
nWBE [3-0] / SDQM [3-0] = A means active and U means inactive
EXT. MEM DATA
CPU REG DATA
BIT NUMBER
BIT NUMBER
BIT NUMBER
BIT NUMBER
BIT NUMBER
OPERATION
SEQUENCE
SDQM [3-0]
XD WIDTH
ACCESS
TIMING
SA
SD
ED
XA
XD
AUUU
31
ABCD
Table7.2.8 Byte access read operation with Big Endian
7 0
7 0
7 0
BA0
BA0
A
A
A
0
READ OPERATION (CPU REGISTER
UAUU
31
ABCD
15 8
7 0
7 0
BA1
BA0
B
B
B
0
WORD
31
ABCD
0
23 16
UUAU
31
ABCD
7 0
BA2
7 0
BA0
C
C
C
X = Don’t care
- 24 -
0
W90N740CD/W90N740CDG
UUUA
31 24
31
ABCD
7 0
BA3
7 0
BA0
D
D
D
0
EXTERNAL MEMORY)
XXAU
15 0
7 0
BAL
7 0
7 0
BAL
CD
C
C
C
HALF WORD
15 0
CD
XXUA
15 8
15 0
BAU
7 0
7 0
BAL
CD
D
D
D
BYTE
XXXA
7 0
7 0
7 0
7 0
7 0
BA
BA
D
D
D
D
D