AT91SAM7S256D-AU Atmel, AT91SAM7S256D-AU Datasheet - Page 128
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
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Manufacturer
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Price
Company:
Part Number:
AT91SAM7S256D-AU
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ATMEL
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101
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Table 20-4.
20.2.4.2
Figure 20-5.
Figure 20-6. SAM7S32/16 Parallel Programming Timing, Read Sequence
Step
1
2
3
4
5
6
For details on the read handshaking sequence, refer to
Programmer Action
Sets MODE and DATA signals
Clears NCMD signal
Waits for RDY low
Releases MODE and DATA signals
Sets NCMD signal
Waits for RDY high
Read Handshaking
Write Handshake
SAM7S542/256/128/321/161 Parallel Programming Timing, Read Sequence
MODE[3:0]
DATA[15:0]
MODE[3:0]
DATA[7:0]
NVALID
NVALID
NCMD
NCMD
NOE
NOE
RDY
RDY
1
1
2
2
Adress IN
Adress IN
ADDR
ADDR
3
3
Device Action
Waits for NCMD low
Latches MODE and DATA
Clears RDY signal
Executes command and polls NCMD high
Executes command and polls NCMD high
Sets RDY
4
4
5
5
Z
Z
Figure
6
6
7
7
20-5,
Data OUT
Data OUT
Figure 20-6
8
8
9
9
SAM7S Series [DATASHEET]
10
10
11
11
X
X
12
12
and
13
13
Table
IN
IN
Data I/O
Input
Input
Input
Input
Input
Input
6175M–ATARM–26-Oct-12
20-5.
128
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