s3c2410a Samsung Semiconductor, Inc., s3c2410a Datasheet - Page 71

• Manufacturer Part Number: s3c2410a
• Description: 16/32-bit Risc Arm Microprocessor
• Manufacturer: Samsung Semiconductor, Inc.

S3C2410A
The THUMB State Register Set
The THUMB state register set is a subset of the ARM state set. The programmer has direct access to eight general
registers, R0-R7, as well as the Program Counter (PC), a stack pointer register (SP), a link register (LR), and the
CPSR. There are banked Stack Pointers, Link Registers and Saved Process Status Registers (SPSRs) for each
privileged mode. This is shown in Figure 2-4.
System & User
R0
R1
R2
R3
R4
R5
R6
R7
SP
LR
PC
CPSR
= banked register
THUMB State General Registers and Program Counter
Figure 2-4. Register Organization in THUMB state
SPSR_
R0
R1
R2
R3
R4
R5
R6
R7
SP_
LR_
PC
CPSR
FIQ
THUMB State Program Status Registers
fiq
fiq
fiq
Supervisor
SPSR_
CPSR
R0
R1
R2
R3
R4
R5
R6
R7
SP_
LR_
PC
svc
svc
svc
SPSR_
R0
R1
R2
R3
R4
R5
R6
R7
SP_
LR_
PC
CPSR
Abort
abt
abt
abt
SPSR_
R0
R1
R2
R3
R4
R5
R6
R7
SP_
LR_
PC
CPSR
IRQ
und
und
irq
Undefined
SPSR_
R0
R1
R2
R3
R4
R5
R6
R7
SP_
LR_
PC
CPSR
PROGRAMMER'S MODEL
fiq
fiq
und
2-5