s3c4510b Samsung Semiconductor, Inc., s3c4510b Datasheet - Page 89
s3c4510b
Manufacturer Part Number
s3c4510b
Description
16/32-bit Risc Microcontroller
Manufacturer
Samsung Semiconductor, Inc.
Datasheet
1.S3C4510B.pdf
(422 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
s3c4510b01-QE80
Manufacturer:
BOURNS
Quantity:
400 000
Company:
Part Number:
s3c4510b01-QE80
Manufacturer:
SUNMNG
Quantity:
853
Company:
Part Number:
s3c4510b01-QER0
Manufacturer:
AMCC
Quantity:
156
Part Number:
s3c4510b01-QER0
Manufacturer:
SAMSUMG
Quantity:
20 000
Company:
Part Number:
s3c4510b01-QERO
Manufacturer:
Panasonic
Quantity:
12 000
Company:
Part Number:
s3c4510b01-QERO
Manufacturer:
SAMSUNG
Quantity:
16 615
- Current page: 89 of 422
- Download datasheet (3Mb)
S3C4510B
SINGLE DATA SWAP (SWP)
The instruction is only executed if the condition is true. The various conditions are defined in Table 3-2. The
instruction encoding is shown in Figure 3-23.
The data swap instruction is used to swap a byte or word quantity between a register and external memory. This
instruction is implemented as a memory read followed by a memory write which are “locked” together (the
processor cannot be interrupted until both operations have completed, and the memory manager is warned to
treat them as inseparable). This class of instruction is particularly useful for implementing software semaphores.
The swap address is determined by the contents of the base register (Rn). The processor first reads the contents
of the swap address. Then it writes the contents of the source register (Rm) to the swap address, and stores the
old memory contents in the destination register (Rd). The same register may be specified as both the source and
destination.
The lock output goes HIGH for the duration of the read and write operations to signal to the external memory
manager that they are locked together, and should be allowed to complete without interruption. This is important
in multi-processor systems where the swap instruction is the only indivisible instruction which may be used to
implement semaphores; control of the memory must not be removed from a processor while it is performing a
locked operation.
BYTES AND WORDS
This instruction class may be used to swap a byte (B = 1) or a word (B = 0) between an ARM7TDMI register and
memory. The SWP instruction is implemented as a LDR followed by a STR and the action of these is as
described in the section on single data transfers. In particular, the description of Big and Little Endian
configuration applies to the SWP instruction.
USE OF R15
Do not use R15 as an operand (Rd, Rn or Rs) in a SWP instruction.
31
Cond
28
27
00010
23
22
B
21
00
Figure 3-23. Swap Instruction
20
[3:0] Source Register
[15:12] Destination Register
[19:16] Base Register
[22] Byte/Word Bit
0 = Swap word quantity
1 = Swap word quantity
[31:28] Condition Field
19
Rn
16
15
Rd
12
11
0000
8 7
1001
4 3
INSTRUCTION SET
Rm
0
3-47
Related parts for s3c4510b
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Transistor,mosfet,n-channel,200v V Br Dss,5.9a
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet:
Part Number:
Description:
Samsung Power Switch
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet:
Part Number:
Description:
Samsung Pm410 Ssd 1.8 Lif 128/64gb
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet:
Part Number:
Description:
Low Voltage Audio Power Amp
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet:
Part Number:
Description:
Dual Equalizer Amplifier With Alc
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet:
Part Number:
Description:
Low Dropout Voltage Regulator
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet:
Part Number:
Description:
1 Chip Codec For Digital Answering Phone
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet:
Part Number:
Description:
10/15 Ch Pll
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet:
Part Number:
Description:
Flextm Roaming Decoder Ii
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet:
Part Number:
Description:
128k X 8bit Low Power And Low Voltage Cmos Statinc Ram
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet:
Part Number:
Description:
Ballast/backlight Controller/driver,sop,20pin,plastic
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet:
Part Number:
Description:
3 Channel R.g.b Video Amplifier
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet:
Part Number:
Description:
Rgb Encoder For Pal/ntsc
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet:
Part Number:
Description:
R/g/b Video Amplifier With Osd Interface For Monitors
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet:
Part Number:
Description:
Remote Control Preamplifier
Manufacturer:
Samsung Semiconductor, Inc.
Datasheet: