W78E052DDG Nuvoton Technology Corporation of America, W78E052DDG Datasheet - Page 56

• Manufacturer Part Number: W78E052DDG
• Description: IC MCU 8-BIT 8K FLASH 40-DIP
• Manufacturer: Nuvoton Technology Corporation of America
• Series: W78r

Specifications of W78E052DDG

• Core Processor: 8052
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 36
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

Typical Watch-Dog time-out period when OSC = 20 MHz
Table 15- 1 Watch-Dog time-out period for 12T per machine cycle, 20MHz
Table 15- 2 Watch-Dog time-out period for 6T per machine cycle, 20MHz
PS2 PS1 PS0
0
0
0
0
1
1
1
1
PS2 PS1 PS0
0
0
0
0
1
1
1
1
Figure 15- 1 Watchdog Timer Block Diagram
0
1
0
1
0
0
1
1
0
1
0
1
0
0
1
1
0
0
1
1
0
1
0
1
0
0
1
1
0
1
0
1
W78E054D/W78E052D/W78E051D Data Sheet
- 56 -
Watchdog time-out period
(for 12T per machine cycle)
19.66 mS
78.64 mS
39.32 mS
157.28 mS
314.57 mS
629.14 mS
1.25 S
2.50 S
Watchdog time-out period
(for 6T per machine cycle)
9.83 mS
39.32 mS
19.66 mS
78.64 mS
157.28 mS
314.57mS
629.14 mS
1.250 S