AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 577
AT91SAM7S256D-AU
Manufacturer Part Number
AT91SAM7S256D-AU
Description
ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU
Manufacturer
Atmel
Series
SAM7S256r
Datasheet
1.AT91SAM7S256D-AU.pdf
(775 pages)
Specifications of AT91SAM7S256D-AU
Rohs
yes
Core
ARM
Processor Series
AT91SAM
Data Bus Width
16 bit/32 bit
Maximum Clock Frequency
55 MHz
Program Memory Size
256 KB
Data Ram Size
64 KB
On-chip Adc
Yes
Operating Supply Voltage
3 V to 3.6 V
Operating Temperature Range
- 40 C to + 85 C
Package / Case
LQFP-64
Mounting Style
SMD/SMT
Interface Type
2-Wire, I2S, SPI, USART
Length
7 mm
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT91SAM7S256D-AU
Manufacturer:
ATMEL
Quantity:
101
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Table 37-22. SPI Timings
Notes:
Symbol
SPI
SPI
SPI
SPI
SPI
SPI
SPI
SPI
SPI
SPI
SPI
SPI
0
1
2
3
4
5
6
7
8
9
10
11
Figure 37-7. SPI Slave mode with (CPOL = NCPHA = 0) or (CPOL= NCPHA= 1)
1. 3.3V domain: V
2. 1.8V domain: V
3. t
Note that in SPI master mode the ATSAM7S512/256/128/64/321/32 does not sample the data (MISO) on the
opposite edge where data clocks out (MOSI) but the same edge is used as shown in
CPMCK
Parameter
MISO Setup time before SPCK rises (master)
MISO Hold time after SPCK rises (master)
SPCK rising to MOSI Delay (master)
MISO Setup time before SPCK falls (master)
MISO Hold time after SPCK falls (master)
SPCK falling to MOSI Delay (master)
SPCK falling to MISO Delay (slave)
MOSI Setup time before SPCK rises (slave)
MOSI Hold time after SPCK rises (slave)
SPCK rising to MISO Delay (slave)
MOSI Setup time before SPCK falls (slave)
MOSI Hold time after SPCK falls (slave)
: Master Clock period in ns.
SPCK
MISO
MOSI
VDDIO
VDDIO
from 3.0V to 3.6V, maximum external capacitor = 40 pF.
from 1.65V to 1.95V, maximum external capacitor = 20 pF.
SPI
9
SPI
Conditions
3.3V domain
1.8V domain
3.3V domain
1.8V domain
3.3V domain
1.8V domain
3.3V domain
1.8V domain
3.3V domain
1.8V domain
3.3V domain
1.8V domain
3.3V domain
1.8V domain
3.3V domain
1.8V domain
3.3V domain
1.8V domain
3.3V domain
1.8V domain
3.3V domain
1.8V domain
3.3V domain
1.8V domain
10
SPI
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(2)
(1)
(2)
11
28.5 + (t
26.5 + (t
38 + (t
44 + (t
SAM7S Series [DATASHEET]
Min
CPMCK
CPMCK
CPMCK
CPMCK
0
0
0
0
2
3
3
2
3
3
3
2
)/2
)/2
)/2
)/2
(3)
(3)
(3)
(3)
Figure 37-4
6175M–ATARM–26-Oct-12
Max
2.5
28
44
28
43
2
7
2
and
Figure
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
37-5.
577
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