32C87 RENESAS [Renesas Technology Corp], 32C87 Datasheet - Page 23

• Manufacturer Part Number: 32C87
• Description: RENESAS MCU
• Manufacturer: RENESAS [Renesas Technology Corp]

M32C/87 Group (M32C/87, M32C/87A, M32C/87B)
REJ03B0127-0151 Rev.1.51 Jul 31, 2008
Page 23 of 85
2.
Figure 2.1 shows the CPU registers.
The register bank is comprised of eight registers (R0, R1, R2, R3, A0, A1, SB, and FB) out of 28 CPU registers. There
are two sets of register banks.
Figure 2.1
General registers
High-speed interrupt registers
DMAC-associated registers
Central Processing Unit (CPU)
NOTE:
1. These registers comprise a register bank.
CPU Register
There are two sets of register banks (register bank 0 and register bank 1).
b31
R2
R3
R2
R3
b23
b23
b23
b15
IPL
b15
b15
b15
DMA0
DMA1
DRA0
DRA1
DSA0
DSA1
INTB
R0H
R1H
USP
SVP
VCT
ISP
SB
PC
A0
A1
FB
R0H
R1H
SB
A0
A1
FB
b8 b7
U
DRC0
DRC1
DCT0
DCT1
FLG
SVF
R2
R3
I
R2
R3
b7
O
B
DMD0
DMD1
R0L
R1L
S
R0L
R1L
Z
D
b0
b0
C
b0
b0
Data registers
Static base register
Frame base register
User stack pointer
Interrupt stack pointer
Interrupt table register
Program counter
Flag register
Carry flag
Debug flag
Zero flag
Sign flag
Register bank select flag
Overflow flag
Interrupt enable flag
Stack pointer select flag
Reserved
Processor interrupt priority level
Reserved
Flag save register
PC save register
Vector register
DMA mode registers
DMA transfer count registers
DMA transfer count reload registers
DMA memory address registers
DMA memory address reload registers
DMA SFR address registers
Address registers
2. Central Processing Unit (CPU)
(1)
(1)
(1)
(1)