W78E516DDG Datasheet, PDF (13/90 Pages) Nuvotem Talema – 8-BIT MICROCONTROLLER

W78E516D/W78E058D Data Sheet
7.7.5 Stack Pointer
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.
7.7.6 Scratch-pad 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 address-
able, and can be directly addressed for this purpose.
7.7.7 AUX-RAM
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 mem-
ory map for this product series. W78E516D/W78E058D series can read/write 256 bytes AUX RAM by
the MOVX instruction.
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Publication Release Date: Feb 15, 2011
Revision A09