参数资料
型号: R5F21294SNXXXSP
厂商: Renesas Technology Corp.
英文描述: SINGLE-CHIP 16-BIT CMOS MCU
中文描述: 单片16位CMOS微控制器
文件页数: 10/71页
文件大小: 552K
代理商: R5F21294SNXXXSP
R8C/28 Group, R8C/29 Group
2. Central Processing Unit (CPU)
Rev.1.10
REJ03B0169-0110
May 17, 2007
Page 10 of 67
2.
Central Processing Unit (CPU)
Figure 2.1 shows the CPU Registers. The CPU contains 13 registers. R0, R1, R2, R3, A0, A1, and FB configure a
register bank. There are two sets of register bank.
Figure 2.1
CPU Registers
R2
R3
b31
b15
R0H (high-order of R0)
b8b7
b0
Data registers
(1)
Address registers
(1)
R2
R3
A0
A1
FB
INTBH
b15
b19
b0
INTBL
Frame base register
(1)
The 4 high order bits of INTB are INTBH and
the 16 low order bits of INTB are INTBL.
Interrupt table register
b19
b0
USP
ISP
SB
Program counter
User stack pointer
Interrupt stack pointer
Static base register
PC
FLG
Flag register
Carry flag
Debug flag
Zero flag
Sign flag
Register bank select flag
Overflow flag
Interrupt enable flag
Stack pointer select flag
Reserved bit
Processor interrupt priority level
Reserved bit
C
IPL
D
Z
S
B
O
I
U
b15
b0
b15
b0
b15
b0
b8
b7
NOTE:
1. These registers comprise a register bank. There are two register banks.
R1H (high-order of R1)
R0L (low-order of R0)
R1L (low-order of R1)
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