SAM3N4B Atmel Corporation, SAM3N4B Datasheet - Page 89
SAM3N4B
Manufacturer Part Number
SAM3N4B
Description
Manufacturer
Atmel Corporation
Specifications of SAM3N4B
Flash (kbytes)
256 Kbytes
Pin Count
64
Max. Operating Frequency
48 MHz
Cpu
Cortex-M3
# Of Touch Channels
32
Hardware Qtouch Acquisition
No
Max I/o Pins
79
Ext Interrupts
79
Quadrature Decoder Channels
2
Usb Speed
No
Usb Interface
No
Spi
3
Twi (i2c)
2
Uart
4
Ssc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
10
Adc Resolution (bits)
10
Adc Speed (ksps)
384
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
24
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
1.62 to 3.6
Fpu
No
Mpu / Mmu
no / no
Timers
6
Output Compare Channels
6
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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10.12.2
10.12.2.1
10.12.2.2
10.12.2.3
10.12.2.4
11011A–ATARM–04-Oct-10
LDR and STR, immediate offset
Syntax
Operation
Offset addressing
Pre-indexed addressing
Load and Store with immediate offset, pre-indexed immediate offset, or post-indexed immediate
offset.
where:
op
type
cond
Rt
Rn
offset
Rt2
LDR instructions load one or two registers with a value from memory.
STR instructions store one or two register values to memory.
Load and store instructions with immediate offset can use the following addressing modes:
The offset value is added to or subtracted from the address obtained from the register Rn. The
result is used as the address for the memory access. The register Rn is unaltered. The assem-
bly language syntax for this mode is:
The offset value is added to or subtracted from the address obtained from the register Rn. The
result is used as the address for the memory access and written back into the register Rn. The
assembly language syntax for this mode is:
op{type}{cond} Rt, [Rn {, #offset}]
op{type}{cond} Rt, [Rn, #offset]!
op{type}{cond} Rt, [Rn], #offset
opD{cond} Rt, Rt2, [Rn {, #offset}]
opD{cond} Rt, Rt2, [Rn, #offset]!
opD{cond} Rt, Rt2, [Rn], #offset
[Rn, #offset]
LDR
STR
B
SB
H
SH
-
is one of:
Load Register.
Store Register.
is one of:
unsigned byte, zero extend to 32 bits on loads.
signed byte, sign extend to 32 bits (LDR only).
unsigned halfword, zero extend to 32 bits on loads.
signed halfword, sign extend to 32 bits (LDR only).
omit, for word.
is an optional condition code, see
is the register to load or store.
is the register on which the memory address is based.
is an offset from Rn. If offset is omitted, the address is the contents of Rn.
is the additional register to load or store for two-word operations.
“Conditional execution” on page
; immediate offset
; pre-indexed
; post-indexed
; immediate offset, two words
; pre-indexed, two words
; post-indexed, two words
84.
SAM3N
89
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