參數(shù)資料
型號(hào)： MB91121PFV
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 50 MHz, RISC MICROCONTROLLER, PQFP120
封裝： PLASTIC, LQFP-120
文件頁(yè)數(shù)： 11/100頁(yè)
文件大?。?/td> 2316K
代理商： MB91121PFV
MB91121 Series
18
DS07-16303-4E
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
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) .
32 bit
Initial value
PC
Program counter
XXXX XXXXH Indeterminate
PS
Program status
TBR
Table base register
0 0 0 F FC0 0H
RP
Return pointer
XXXX XXXXH Indeterminate
SSP
System stack pointer
00 00 0 000H
USP
User’s stack pointer
XXXX XXXXH Indeterminate
MDH
XXXX XXXXH Indeterminate
Multiplication/division result register
MDL
XXXX XXXXH Indeterminate
bit
31
20
19
18
17
16
10
9876543210
PS
ILM4 ILM3 ILM2 ILM1 ILM0
D1
D0
T
SI
N
Z
V
C
ILM
SCR
CCR
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