HD6417750RF240V Datasheet, PDF (55/606 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 2 CPU
• Stack Structure
In advanced mode, when the program counter (PC) is pushed onto the stack in a subroutine
call, and the PC, condition-code register (CCR), and extended control register (EXR) are
pushed onto the stack in exception handling, they are stored as shown in figure 2.4. When
EXR is invalid, it is not pushed onto the stack. For details, see section 4, Exception Handling.
SP
Reserved
PC
(24 bits)
SP
(SP^*2 )
EXR^*1
Reserved^{*1 *3}
CCR
PC
(24 bits)
(a) Subroutine Branch
(b) Exception Handling
Notes: 1. When EXR is not used it is not stored on the stack.
2. SP when EXR is not used.
3. Ignored when returning.
Figure 2.4 Stack Structure in Advanced Mode
Rev. 7.00 Sep. 11, 2009 Page 19 of 566
REJ09B0211-0700