Fujitsu MB96300 series Hardware Manual page 72

CHAPTER 2 CPU
■ Special registers
2
The F MC-16FX CPU has the following special registers:
• Accumulator (A=AH:AL): Two 16-bit accumulators (can be used as a single 32-bit accumulator)
• User stack pointer (USP): 16-bit user stack pointer
• System stack pointer (SSP): 16-bit system stack pointer
• Processor status (PS): 16-bit register indicating the system status
• Program counter (PC): 16-bit register holding the address of the next instruction to be executed
• Program bank register (PCB): 8-bit register indicating the program bank
• Data bank register (DTB): 8-bit register indicating the data bank
• User stack bank register (USB): 8-bit register indicating the user stack bank
• System stack bank register (SSB): 8-bit register indicating the system stack bank
• Additional bank register (ADB): 8-bit register indicating the additional data bank
• Direct page register (DPR): 8-bit register indicating the page for direct access
Figure 2.4-1"Special registers" is a diagram of the special registers.
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Figure 2.4-1 Special registers
AH AL
USP
SSP
PS
PC
16 bit
32 bit
MB96300 Super Series Hardware Manual
Accumulator
User stack pointer
System stack pointer
Processor status
Program counter
DPR
Direct page register
PCB
Program bank register
Data bank register
DTB
User stack bank register
USB
SSB System stack bank register
ADB Additional data bank register
8 bit