AT91SAM7SE256B-CUR Atmel, AT91SAM7SE256B-CUR Datasheet - Page 145
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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Table 21-7.
21.6.5.5
6222F–ATARM–14-Jan-11
Pins
NRD/CFOE
NWR0/NWE/CFWE
NWR1/NBS1/CFIOR
NBS3/CFIOW
NCS0/CFRNW
Application Example
Shared CompactFlash Interface Multiplexing
Figure 21-5 on page 145
CFRNW signals are not directly connected to the CompactFlash slot 0, but do control the direc-
tion and the output enable of the buffers between the EBI and the CompactFlash Device. The
timing of the CFCS0 signal is identical to the NCS4 signal. Moreover, the CFRNW signal
remains valid throughout the transfer, as does the address bus. The CompactFlash _WAIT sig-
nal is connected to the NWAIT input of the Static Memory Controller. For details on these
waveforms and timings, refer to the Static Memory Controller Section.
Figure 21-5. CompactFlash Application Example
Access to CompactFlash Device
CompactFlash Signals
CFOE
CFWE
CFIOR
CFIOW
CFRNW
NCS0/CFRNW
NCS4/CFCS0
NWR1/CFIOR
NCS5/CFCE1
NCS6/CFCE2
NWE/CFWE
NRD/CFOE
A22/REG
CD (PIO)
D[15:0]
CFIOW
NWAIT
A[10:0]
illustrates an example of a CompactFlash application. CFCS0 and
SAM7SE512/256/32 Preliminary
DIR
/OE
/OE
Access to Other EBI Devices
EBI Signals
NRD
NWR0/NWE
NWR1/NBS1
NBS3
NCS0
D[15:0]
_CD1
_CD2
A[10:0]
_REG
_OE
_WE
_IORD
_IOWR
_CE1
_CE2
_WAIT
145
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