HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 117

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

4.6
When accessing word data or longword data, the H8/3008 regards the lowest address bit as 0. The
stack should always be accessed by word access or longword access, and the value of the stack
pointer (SP:ER7) should always be kept even.
Use the following instructions to save registers:
Use the following instructions to restore registers:
Setting SP to an odd value may lead to a malfunction. Figure 4.6 shows an example of what
happens when the SP value is odd.
PUSH.W Rn (or MOV.W Rn, @–SP)
PUSH.L ERn (or MOV.L ERn, @–SP)
POP.W Rn
POP.L ERn
Notes on Stack Usage
(or MOV.W @SP+, Rn)
(or MOV.L @SP+, ERn)
Rev.4.00 Aug. 20, 2007 Page 73 of 638
4. Exception Handling
REJ09B0395-0400