W77E058A40DL Nuvoton Technology Corporation of America, W77E058A40DL Datasheet - Page 41

• Manufacturer Part Number: W77E058A40DL
• Description: IC MCU 8-BIT 32K FLASH 40-DIP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: W77r

Specifications of W77E058A40DL

• Program Memory Type: FLASH
• Program Memory Size: 32KB (32K x 8)
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: EBI/EMI, Serial Port
• Peripherals: POR, WDT
• Number Of I /o: 32
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-DIP
• Cpu Family: W77
• Device Core: 8051
• Device Core Size: 8b
• Frequency (max): 40MHz
• Interface Type: UART
• Total Internal Ram Size: 1KB
• # I/os (max): 32
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Instruction Set Architecture: CISC
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 40
• Package Type: PDIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / RoHS Status: Compliant, Lead free / RoHS Compliant

from 0 to 7, resulting in MOVX instructions that last from 2 to 9 machine cycles in length. Note that the
stretching of the instruction only results in the elongation of the MOVX instruction, as if the state of the
CPU was held for the desired period. There is no effect on any other instruction or its timing. By
default, the Stretch value is set at 1, giving a MOVX instruction of 3 machine cycles. If desired by the
user the stretch value can be set to 0 to give the fastest MOVX instruction of only 2 machine cycles.
Table 4. Data Memory Cycle Stretch Values
M2
0
0
0
0
1
1
1
1
PORT 0
PORT 2
PSEN
M1
0
0
1
1
0
0
1
1
CLK
ALE
WR
M0
C1
0
1
0
1
0
1
0
1
MOVX Inst.
Address
of Previous
Last Cycle
Instruction
C2
A0-A7
Figure 8. Data Memory Write with Stretch Value = 0
C3
A15-A8
3 (default)
MACHINE
CYCLES
MOVX Inst
C4
D0-D7
2
4
5
6
7
8
9
C1
Machine cycle
.
Next Inst.
Address
C2
A0-A7
First
MOVX instruction cycle
STROBE WIDTH
- 41 -
C3
A15-A8
Next Inst. Read
RD
IN CLOCKS
C4
D0-D7
OR
12
16
20
24
28
2
4
8
C1
MOVX Data
WR
Machine cycle
Address
A0-A7
C2
Second
Publication Release Date: April 17, 2007
C3
A15-A8
MOVX Data out
D0-D7
C4
WIDTH @ 25
RD
STROBE
1120 nS
160 nS
320 nS
480 nS
640 nS
800 nS
960 nS
80 nS
C1
MHZ
OR
Next Instruction
Machine Cycle
C2
A0-A7
WR
C3
A15-A8
W77E058A
C4
D0-D7
WIDTH @ 40
RD
STROBE
100 nS
200 nS
300 nS
400 nS
500 nS
600 nS
700 nS
50 nS
Revision A10
MHZ
OR
WR