W78E052DDG Nuvoton Technology Corporation of America, W78E052DDG Datasheet - Page 67

• 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: -

W78E054D/W78E052D/W78E051D Data Sheet
19 CONFIG BITS
During the on-chip Flash EPROM operation mode, the Flash EPROM can be programmed and veri-
fied repeatedly. Until the code inside the Flash EPROM is confirmed OK, the code can be protected.
The protection of Flash EPROM and those operations on it are described below.
The W78E054D/W78E052D/W78E051D has a Special Setting Register, the config Bits, which can not
be accessed in normal mode. The Security register can only be accessed from the Flash EPROM op-
eration mode. Those bits of the Security Registers can not be changed once they have been pro-
grammed from high to low. They can only be reset through erase-all operation. The Security Register
is addressed in the Flash EPROM operation mode by address #0FFFFh.
Publication Release Date: Dec 29, 2009
- 67 -
Revision A09