MC80F0424 Datasheet, PDF (30/135 Pages) List of Unclassifed Manufacturers – 8-BIT SINGLE-CHIP MICROCONTROLLERS

MC80F0424/0432/0448
Preliminary
At execution of
a CALL/TCALL/PCALL
01FF
01FE
01FD
01FC
PCH
PCL
Push
down
At acceptance
of interrupt
01FF
01FE
01FD
01FC
PCH
PCL
PSW
Push
down
At execution
of RET instruction
01FF PCH
Pop
01FE PCL
up
01FD
01FC
SP before
execution
SP after
execution
01FF
01FD
01FF
01FC
01FD
01FF
At execution
of PUSH instruction
PUSH A (X,Y,PSW)
01FF
A
01FE
01FD
01FC
Push
down
At execution
of POP instruction
POP A (X,Y,PSW)
01FF
A
Pop
up
01FE
01FD
01FC
SP before
execution
SP after
execution
01FF
01FE
01FE
01FF
At execution
of RET instruction
01FF PCH
Pop
01FE PCL
up
01FD PSW
01FC
01FC
01FF
0100H
Stack
depth
01FFH
Figure 8-4 Stack Operation
8.2 Program Memory
A 16-bit program counter is capable of addressing up to 64K
bytes, but this device has 24/32/48K bytes program memory
space only physically implemented. Accessing a location above
FFFF_H will cause a wrap-around to 0000_H.
Figure 8-5, shows a map of Program Memory. After reset, the
CPU begins execution from reset vector which is stored in ad-
dress FFFE_H and FFFF_H as shown in Figure 8-6.
As shown in Figure 8-5, each area is assigned a fixed location in
Program Memory. Program Memory area contains the user pro-
gram
26
MAR. 2005 Ver 0.2