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S3C4530A Datasheet(PDF) 32 Page - Samsung semiconductor

Part No. S3C4530A
Description  16/32-bit RISC microcontroller is a cost-effective, high-performance microcontroller
Download  432 Pages
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Maker  SAMSUNG [Samsung semiconductor]
Homepage  http://www.samsung.com/Products/Semiconductor
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S3C4530A Datasheet(HTML) 32 Page - Samsung semiconductor

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PROGRAMMER'S MODEL
S3C4530A
2-6
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.
CPSR
CPSR
SPSR_fiq
CPSR
SPSR_svc
CPSR
SPSR_abt
CPSR
SPSR_irq
CPSR
SPSR_und
System & User
FIQ
Supervisor
About
IRG
Undefined
THUMB State Program Status Registers
= banked register
THUMB State General Registers and Program Counter
R0
R1
R2
R3
R4
R5
R6
R7
SP
LR
PC
SP_fiq
LR_fiq
R0
R1
R2
R3
R4
R5
R6
R7
PC
SP_svg
LR_svc
R0
R1
R2
R3
R4
R5
R6
R7
PC
SP_abt
LR_abt
R0
R1
R2
R3
R4
R5
R6
R7
PC
SP_irq
LR_irq
R0
R1
R2
R3
R4
R5
R6
R7
PC
SP_und
LR_und
R0
R1
R2
R3
R4
R5
R6
R7
PC
Figure 2-4. Register Organization in THUMB State


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