W77E058A40DL Nuvoton Technology Corporation of America, W77E058A40DL Datasheet - Page 74

• 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

W77E058A
Security Bits
During the on-chip Flash EPROM operation mode, the Flash EPROM can be programmed and verified
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 W77E058 has a Special Setting Register, the Security Register, which can not be accessed in
normal mode. The register can only be accessed from the Flash EPROM operation mode. Those bits
of the Security Registers can not be changed once they have been programmed 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.
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