AT91SAM7SE256B-AUR Atmel, AT91SAM7SE256B-AUR Datasheet - Page 197
AT91SAM7SE256B-AUR
Manufacturer Part Number
AT91SAM7SE256B-AUR
Description
IC ARM7 MCU FLASH 256K 128-LQFP
Manufacturer
Atmel
Series
AT91SAMr
Datasheet
1.AT91SAM7SE256-AU.pdf
(673 pages)
Specifications of AT91SAM7SE256B-AUR
Core Processor
ARM7
Core Size
16/32-Bit
Speed
55MHz
Connectivity
EBI/EMI, I²C, SPI, SSC, UART/USART, USB
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
88
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
32K x 8
Voltage - Supply (vcc/vdd)
1.65 V ~ 1.95 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Processor Series
SAM7SE256
Core
ARM7TDMI
Data Bus Width
32 bit
Data Ram Size
32 KB
Interface Type
SPI, USB
Maximum Clock Frequency
48 MHz
Number Of Programmable I/os
88
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Operating Temperature Range
- 40 C to + 85 C
Processor To Be Evaluated
AT91SAM7SE256B
Supply Current (max)
60 uA
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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• DBW: Data Bus Width
• DRP: Data Read Protocol
0: Standard Read Protocol is used.
1: Early Read Protocol is used.
• ACSS: Address to Chip Select Setup
• RWSETUP: Read and Write Signal Setup Time
See definition and description below.
• RWHOLD: Read and Write Signal Hold Time
See definition and description below
Notes:
6222F–ATARM–14-Jan-11
0
0
0
0
1
1
1
1
1. For a visual description, please refer to
2. In Standard Read Protocol.
3. In Early Read Protocol. (It is not possible to use the parameters RWSETUP or RWHOLD in this mode.)
4. When the ECC Controller is used, RWHOLD must be programmed to 1 at least.
RWSETUP
22-46
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
and
(1)
Figure 22-47 on page
ACSS
DBW
0
1
0
1
0
1
0
1
NRD Setup
½ cycle
0 cycles
1 + ½ cycles
2 + ½ cycles
3 + ½ cycles
4 + ½ cycles
5 + ½ cycles
6 + ½ cycles
7 + ½ cycles
0
1
0
1
0
1
0
1
.
(2)
(3)
or
198.
“Setup and Hold Cycles” on page 174
NWR Setup
½ cycle
1 + ½ cycles
2 + ½ cycles
3 + ½ cycles
4 + ½ cycles
5 + ½ cycles
6 + ½ cycles
7 + ½ cycles
Data Bus Width
Reserved
16-bit
8-bit
Reserved
Chip Select Waveform
Standard, asserted at the beginning of the access and deasserted at the end.
One cycle less at the beginning and the end of the access.
Two cycles less at the beginning and the end of the access.
Three cycles less at the beginning and the end of the access.
SAM7SE512/256/32 Preliminary
0
0
0
0
1
1
1
1
RWHOLD
0
0
1
1
0
0
1
1
(1) (4)
and the diagrams in
0
1
0
1
0
1
0
1
NRD Hold
0
1 cycles
2 cycles
3 cycles
4 cycles
5 cycles
6 cycles
7 cycles
Figure 22-45
NWR Hold
½ cycle
1 cycle
2 cycles
3 cycles
4 cycles
5 cycles
6 cycles
7 cycles
and
Figure
197
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