HD64F2168 Datasheet, PDF (67/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Bit Bit Name Initial Value R/W Description
0C
Undefined R/W Carry Flag
Set to 1 when a carry occurs, and cleared to 0 otherwise.
Used by:
• Add instructions, to indicate a carry
• Subtract instructions, to indicate a borrow
• Shift and rotate instructions, to indicate a carry
The carry flag is also used as a bit accumulator by bit
manipulation instructions.
2.4.5 Initial Register Values
Reset exception handling loads the CPU's program counter (PC) from the vector table, clears the
trace (T) bit in EXR to 0, and sets the interrupt mask (I) bits in CCR and EXR to 1. The other
CCR bits and the general registers are not initialized. Note that the stack pointer (ER7) is
undefined. The stack pointer should therefore be initialized by an MOV.L instruction executed
immediately after a reset.
Rev. 3.00, 03/04, page 27 of 830