MC9S08GB32 Motorola, MC9S08GB32 Datasheet - Page 126

• Manufacturer Part Number: MC9S08GB32
• Description: Microcontrollers
• Manufacturer: Motorola

Central Processor Unit (CPU)
8.2
Features of the HCS08 CPU include:
8.3
Figure 8-1
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Object code fully upward-compatible with M68HC05 and M68HC08 Families
All registers and memory are mapped to a single 64-Kbyte address space
16-bit stack pointer (any size stack anywhere in 64-Kbyte address space)
16-bit index register (H:X) with powerful indexed addressing modes
8-bit accumulator (A)
Many instructions treat X as a second general-purpose 8-bit register
Seven addressing modes:
— Inherent — Operands in internal registers
— Relative — 8-bit signed offset to branch destination
— Immediate — Operand in next object code byte(s)
— Direct — Operand in memory at $0000–$00FF
— Extended — Operand anywhere in 64-Kbyte address space
— Indexed relative to H:X — Five submodes including auto increment
— Indexed relative to SP — Improves C efficiency dramatically
Memory-to-memory data move instructions with four address mode combinations
Overflow, half-carry, negative, zero, and carry condition codes support conditional branching on
the results of signed, unsigned, and binary-coded decimal (BCD) operations
Efficient bit manipulation instructions
Fast 8-bit by 8-bit multiply and 16-bit by 8-bit divide instructions
STOP and WAIT instructions to invoke low-power operating modes
Features
Programmer’s Model and CPU Registers
shows the five CPU registers. CPU registers are not part of the memory map.
MC9S08GB/GT Data Sheet, Rev. 2.3
Freescale Semiconductor