W78E516DPG Nuvoton Technology Corporation of America, W78E516DPG Datasheet - Page 12

• Manufacturer Part Number: W78E516DPG
• Description: IC MCU 8-BIT 64K FLASH 44-PLCC
• Manufacturer: Nuvoton Technology Corporation of America
• Series: W78r

Specifications of W78E516DPG

• 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: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

The W78E516D/W78E058D series has an 8-bit Stack Pointer which points to the top of the Stack.
This stack resides in the Scratch Pad RAM in the W78E516D/W78E058D series. Hence the size of
the stack is limited by the size of this RAM.
The W78E516D/W78E058D series has a 256 bytes on-chip scratch-pad RAM. This can be used by
the user for temporary storage during program execution. A certain section of this RAM is bit
addressable, and can be directly addressed for this purpose.
AUX-RAM 0H~255H is addressed indirectly as the same way to access external data memory with the
MOVX instruction. The data memory region is from 0000H to 00FFH. Memory MAP shows the
memory map for this product series. W78E516D/W78E058D series can read/write 256 bytes AUX
RAM by the MOVX instruction.
7.7.5
7.7.6
7.7.7
Stack Pointer
Scratch-pad RAM
AUX-RAM
Preliminary W78E516D/W78E058D Data Sheet
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