MB91106PFV View Datasheet(PDF) - Fujitsu
Part Name
Description
Manufacturer
MB91106PFV Datasheet PDF : 116 Pages
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MB91106 Series
2. Registers
The FR family has two types of registers; dedicated registers embedded on the CPU and general-purpose
registers on memory.
• Dedicated registers
Program counter (PC):
32-bit length, indicates the location of the instruction to be executed.
Program status (PS):
32-bit length, register for storing register pointer or condition codes
Table base register (TBR): Holds top address of vector table used in EIT (Exceptional/Interrupt/Trap)
processing.
Return pointer (RP):
Holds address to resume operation after returning from a subroutine.
System stack pointer (SSP): Indicates system stack space.
User's stack pointer (USP): Indicates user’s stack space.
Multiplication/division result register (MDH/MDL): 32-bit length, register for multiplication/division
32 bits
PC
PS
TBR
RP
SSP
USP
MDH
MDL
Program counter
Program status
Table base register
Return pointer
System stack pointer
User’s stack pointer
Multiplication/division result register
Initial value
XXXX XXXXH Indeterminate
000F FC00H
XXXX XXXXH Indeterminate
0000 0000H
XXXX XXXXH Indeterminate
XXXX XXXXH
XXXX XXXXH
Indeterminate
Indeterminate
• Program status (PS)
The PS register is for holding program status and consists of a condition code register (CCR), a system condition
code register (SCR) and a interrupt level mask register (ILM).
31 20 19 18 17 16
10 9 8 7 6 5 4 3 2 1 0
PS — ILM4 ILM3 ILM2 ILM1 ILM0 — D1 D0 T — — S I N Z V C
ILM
SCR
CCR
21
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