AT91SAM7SE256B-CUR Atmel, AT91SAM7SE256B-CUR Datasheet - Page 167
AT91SAM7SE256B-CUR
Manufacturer Part Number
AT91SAM7SE256B-CUR
Description
IC ARM7 MCU FLASH 256K 128-LQFP
Manufacturer
Atmel
Series
AT91SAMr
Datasheet
1.AT91SAM7SE256-AU.pdf
(673 pages)
Specifications of AT91SAM7SE256B-CUR
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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22.6.2.4
6222F–ATARM–14-Jan-11
Write Data Hold Time
Figure 22-8
on NCS2 (BAT = 1).
Figure 22-8. Connection to a 16-bit Data Path Device without Byte Write Capability
During write cycles, data output becomes valid after the rising edge of MCK and remains valid
after the rising edge of NWE. During a write access, the data remain on the bus 1/2 period of
MCK after the rising edge of NWE. See
Figure 22-9. Write Access with 0 Wait State
D[15:0]
A[22:0]
NWE
MCK
NCS
shows how to connect a 16-bit device without byte access (e.g., Flash device type)
SMC
D[15:8]
A[19:1]
D[7:0]
NCS2
NWE
NRD
NUB
NLB
SAM7SE512/256/32 Preliminary
Figure 22-9
and
Figure
D[7:0]
D[15:8]
A[18:0]
Write Enable
Output Enable
Memory Enable
22-10.
167
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