MC68HC908LJ12 Datasheet, PDF (59/413 Pages) Freescale Semiconductor, Inc – 8-bit microcontroller units

Random-Access Memory (RAM)
During a subroutine call, the CPU uses two bytes of the stack to store
the return address. The stack pointer decrements during pushes and
increments during pulls.
NOTE:
Be careful when using nested subroutines. The CPU may overwrite data
in the RAM during a subroutine or during the interrupt stacking
operation.
Technical Data
60
Random-Access Memory (RAM)
MC68HC908LJ12 — Rev. 2.1
Freescale Semiconductor