参数资料
型号: MB91F355APMT
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 50 MHz, RISC MICROCONTROLLER, PQFP176
封装: 0.50 MM PITCH, LEAD FREE, PLASTIC, LQFP-176
文件页数: 33/112页
文件大小: 1095K
代理商: MB91F355APMT
MB91350A Series
27
4.
Register
General purpose registers
Registers R0 to R15 are general-purpose registers. The registers are used as the accumulator and memory
access pointers for CPU operations.
Of these 16 registers, the registers listed below are intended for special applications, for which some instructions
are enhanced.
R13 : Virtual accumulator
R14 : frame pointer
R15 : Stack pointer
The initial values of R0 to R14 after a reset are indeterminate. R15 is initialized to 0000 0000H (SSP value).
PS (Program Status)
This register holds the program status and is divided into the ILM, SCR, and CCR.
The undefined bits in the following illustration are all reserved bits. Reading these bits always returns 0. Writing
to them has no effect.
R0
R1
R12
R13
R14
R15
AC
FP
SP
XXXX XXXXH
0000 0000 H
32 bits
Initial Value:
Bit position
PS
31
20
16
ILM
SCR
CCR
10
7
8
0
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