參數(shù)資料
型號(hào): FR65E
廠商: Fujitsu Limited
英文描述: 32-Bit Microcontroller
中文描述: 32位微控制器
文件頁數(shù): 22/87頁
文件大?。?/td> 369K
代理商: FR65E
MB91307B
22
4.
General Purpose Register
Registers
Registers R 0 to R 15 are general-purpose registers. These registers can be used as accumulators for compu-
tation operations, or as pointers for memory access.
Of the 16 registers, enhanced commands are provided for the following registers to enable their use for particular
applications.
R13: Virtual accumulator
R14: Frame pointer
R15: Stack pointer
Default values at reset are undefined for R0 to R14. The value for R15 is 00000000
H
(SSP value).
PS (Program Status Register)
This register holds the program status, and is divided into three parts, ILM, SCR, and CCR.
All bits not defined in the diagram are reserved bits with read value “0” at all times. Write access to these bits
is not enabled.
CCR (Condition Code Register)
S : Stack flag, cleared to “0” at reset.
I : Interrupt flag, cleared to “0” at reset.
N : Negative flag, default value at reset undefined.
Z : Zero flag, default value at reset undefined.
V : Overflow flag, default value at reset undefined.
C : Carry flag, default value at reset undefined.
R0
R1
R12
R13
R14
R15
AC
FP
SP
XXXX XXXX
H
XXXX XXXX
H
0000 0000
H
32 bits
[Default values]
Bit position
PS Register
31
20
16
ILM
SCR
CCR
10
7
8
0
[Default value]
- - 00XXXX
B
CCR Register
7
6
5
4
3
2
1
0
S
I
N
Z
V
C
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