W90N740CDG Nuvoton Technology Corporation of America, W90N740CDG Datasheet - Page 24

• 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 7.2.5 and Table 7.2.6
Using big-endian and half-word access, Program/Data path between register and external memory.
HA = Address whose LSB is 0, 2, 4, 6, 8, A, C, E
HAU = Address whose LSB is 2, 6, A, E
nWBE [3-0] / SDQM [3-0] = A means active and U means inactive
Ext. Mem Data
CPU Reg Data
OPERATION
Bit Number
Bit Number
Bit Number
SDQM [3-0]
Bit Number
Bit Number
XD WIDTH
Sequence
ACCESS
Timing
SA
SD
ED
XA
XD
WORD
Table7.2.4 Word access read operation with Big Endian
31
ABCD
31
ABCD
31
ABCD
AAAA
31
ABCD
31
ABCD
WA
WA
0
0
0
0
0
READ OPERATION (CPU REGISTER
1st read
31
CD XX
XXAA
15 0
15 0
WA
CD
CD
HALF WORD
0
31
CD AB
31
CDAB
WA
0
0
2nd read
31
CD AB
WA+2
XXAA
15 0
15 0
AB
AB
0
- 21 -
W90N740CD/W90N740CDG
D X X X
31
1st read
HAL = Address whose LSB is 0, 4, 8, C
X = Don’t care
XXXA
7 0
7 0
WA
D
D
0
Publication Release Date: Aug. 18, 2005
D C X X
2nd read
31
EXTERNAL MEMORY)
WA+1
XXXA
7 0
7 0
C
C
D C B A
31
0
BYTE
31
DCBA
WA
0
D C B X
31
3rd read
0
WA+2
XXXA
7 0
7 0
B
B
0
Revision A6
D C B A
31
4th read
WA+3
XXXA
7 0
7 0
A
A
0