W90N740CDG Nuvoton Technology Corporation of America, W90N740CDG Datasheet - Page 23

• 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 7.2.3 and Table 7.2.4
Using big-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
NWBE [3-0] /
SEQUENCE
SDQM [3-0]
XD WIDTH
ACCESS
TIMING
SA
SD
ED
XA
XD
WORD
Table7.2.3 Word access write operation with Big Endian
31
ABCD
31
ABCD
31
ABCD
31
ABCD
31
ABCD
AAAA
WA
WA
0
0
0
0
0
WRITE OPERATION (CPU REGISTER
1st write
XXAA
15 0
15 0
15 0
WA
AB
AB
AB
HALF WORD
31
AB CD
31
ABCD
WA
0
0
2nd write
WA+2
XXAA
15 0
15 0
15 0
CD
CD
CD
X = Don’t care
- 20 -
W90N740CD/W90N740CDG
1st write
XXXA
7 0
7 0
7 0
WA
A
A
A
2nd write
EXTERNAL MEMORY)
WA+1
XXXA
7 0
7 0
7 0
B
B
B
A B C D
31
BYTE
31
ABCD
WA
0
3rd write
0
WA+2
XXXA
7 0
7 0
7 0
C
C
C
4th write
WA+3
XXXA
7 0
7 0
7 0
D
D
D