ATSAM3U2EA-AU Atmel, ATSAM3U2EA-AU Datasheet - Page 597
![IC MCU 32BIT 128KB FLASH 144LQFP](/photos/6/72/67244/144l1-lqfp_sml.jpg)
ATSAM3U2EA-AU
Manufacturer Part Number
ATSAM3U2EA-AU
Description
IC MCU 32BIT 128KB FLASH 144LQFP
Manufacturer
Atmel
Series
SAM3Ur
Specifications of ATSAM3U2EA-AU
Core Processor
ARM® Cortex-M3™
Core Size
32-Bit
Speed
96MHz
Connectivity
EBI/EMI, I²C, MMC, SPI, SSC, UART/USART, USB
Peripherals
Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
Number Of I /o
96
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
36K x 8
Voltage - Supply (vcc/vdd)
1.65 V ~ 1.95 V
Data Converters
A/D 8x10b, 8x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
144-LQFP
Controller Family/series
SAM3U
No. Of I/o's
96
Ram Memory Size
36KB
Cpu Speed
96MHz
No. Of Timers
3
Rohs Compliant
Yes
Processor Series
ATSAM3x
Core
ARM Cortex M3
Data Bus Width
32 bit
Data Ram Size
36 KB
Interface Type
4xUSART, 2xTWI, 5xSPI, Bus
Maximum Clock Frequency
96 MHz
Number Of Programmable I/os
96
Number Of Timers
8
Operating Supply Voltage
1.62 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
JTRACE-CM3, MDK-ARM, RL-ARM, ULINK2
Development Tools By Supplier
ATSAM3U-EK
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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Figure 32-8. Programmable Delays
32.7.3.5
6430D–ATARM–25-Mar-11
6430D–ATARM–25-Mar-11
Chip Select 1
Chip Select 2
Peripheral Selection
SPCK
These delays allow the SPI to be adapted to the interfaced peripherals and their speed and bus
release time.
The serial peripherals are selected through the assertion of the NPCS0 to NPCS3 signals. By
default, all the NPCS signals are high before and after each transfer.
Fixed Peripheral Select is activated by writing the PS bit to zero in SPI_MR (Mode Register). In
this case, the current peripheral is defined by the PCS field in SPI_MR and the PCS field in the
SPI_TDR has no effect.
Variable Peripheral Select is activated by setting PS bit to one. The PCS field in SPI_TDR is
used to select the current peripheral. This means that the peripheral selection can be defined for
each new data. The value to write in the SPI_TDR register as the following format.
[xxxxxxx(7-bit) + LASTXFER(1-bit)
equals to the chip select to assert as defined in
LASTXFER bit at 0 or 1 depending on CSAAT bit.
Note:
CSAAT, LASTXFER bits are discussed in
.
If LASTXFER is used, the command must be issued before writing the last character. Instead of
LASTXFER, the user can use the SPIDIS command. After the end of the DMA transfer, wait for
the TXEMPTY flag, then write SPIDIS into the SPI_CR register (this will not change the configu-
ration register values); the NPCS will be deactivated after the last character transfer. Then,
another DMA transfer can be started if the SPIEN was previously written in the SPI_CR register.
• The delay before SPCK, independently programmable for each chip select by writing the field
• The delay between consecutive transfers, independently programmable for each chip select
• Fixed Peripheral Select: SPI exchanges data with only one peripheral
• Variable Peripheral Select: Data can be exchanged with more than one peripheral without
DLYBS. Allows the start of SPCK to be delayed after the chip select has been asserted.
by writing the DLYBCT field. Allows insertion of a delay between two transfers occurring on
the same chip select
having to reprogram the NPCS field in the SPI_MR register.
1. Optional.
DLYBCS
DLYBS
()
+ xxxx(4-bit) + PCS (4-bit) + DATA (8 to 16-bit)] with PCS
Section 32.7.3.9 ”Peripheral Deselection with DMAC”
Section 32.8.4
DLYBCT
(SPI Transmit Data Register) and
SAM3U Series
SAM3U Series
DLYBCT
597
597
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