MB90552APF datasheet(21/64 Pages) FUJITSU

21 / 64 page

MB90550A/550B Series

DS07-13706-6E

■ F2MC-16LX CPU PROGRAMMING MODEL

• Dedicated registers

USP

SSP

DPR

PCB

DTB

USB

SSB

ADB

8 bit

16 bit

32 bit

: Accumulator (A)

Dual 16-bit register used for storing results of calculation, etc. The two 16-bit

registers can be combined and used as a 32-bit register.

: Additional data bank register (ADB)

The 8-bit register indicating the additional data space.

: User stack bank register (USB)

The 8-bit register indicating the user stack space.

: System stack pointer (SSP)

The 16-bit pointer indicating the status of the system stack address.

: Processor status (PS)

The 16-bit register indicating the system status.

: Program bank register (PCB)

The 8-bit register indicating the program space.

: Data bank register (DTB)

The 8-bit register indicating the data space.

: Program counter (PC)

The 16-bit register indicating storing location of the current instruction code.

: Direct page register (DPR)

The 8-bit register indicating bits 8 through 15 of the operand address in the short

direct addressing mode.

: System stack bank register (SSB)

The 8-bit register indicating the system stack space.

: User stack pointer (USP)

The 16-bit pointer indicating a user stack address.

MB90552APF Datasheet(PDF) 21 Page - fujitsu semiconductor