Dedicated Registers And General-Purpose Register - Fujitsu MB90895 Series Hardware Manual

3.2.1

Dedicated Registers and General-purpose Register

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The F MC-16LX family has two types of registers: dedicated registers in the CPU and
general-purpose register in the internal RAM.
I Dedicated Registers and General-purpose Register
The dedicated registers are limited to the use in the hardware architecture of the CPU.
The general-purpose registers are in the internal RAM in the CPU address space. As with the dedicated
registers, these registers can be used for addressing and the use of these registers is not limited.
Figure 3.2-2 "Dedicated Registers and General-purpose Register" shows the allocation of the dedicated
registers and the general-purpose registers.
Figure 3.2-2 Dedicated Registers and General-purpose Register
Dedicated register
Accumulator
User stack pointer
System stack pointer
Processor status
Program counter
Direct page register
Program bank register
Data bank register
User stack bank register
System stack bank register
Additional data bank register
CPU
CHAPTER 3 CPU
Internal RAM
General-purpose
register
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