SAM7SE256 Atmel Corporation, SAM7SE256 Datasheet - Page 641

• Manufacturer Part Number: SAM7SE256
• Manufacturer: Atmel Corporation

Specifications of SAM7SE256

• Flash (kbytes): 256 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 48 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 88
• Ext Interrupts: 88
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 1
• Uart: 3
• Ssc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

40.8.6
The maximum operating frequency is given in
time when the processor is fetching code out of it.
quency depending on the FWS field of the MC_FMR register. This field defines the number of wait states required to
access the Embedded Flash Memory.
Table 40-32. Embedded Flash Wait States (VDDCORE = 1.65V)
Notes:
Table 40-33. Embedded Flash Wait States (VDDCORE = 1.8V)
Notes:
Table 40-34. AC Flash Characteristics
6222F–ATARM–14-Jan-11
Parameter
Program Cycle Time
Full Chip Erase
1. FWS = Flash Wait States
2. It is not necessary to use 3 wait states because the Flash can operate at maximum frequency with only 2 wait states.
1. FWS = Flash Wait States
2. It is not necessary to use 2 or 3 wait states because the Flash can operate at maximum frequency with only 1 wait state.
Embedded Flash Characteristics
FWS
FWS
3
2
3
0
1
2
0
1
(2)
(2)
(2)
(1)
(1)
Conditions
per page including auto-erase
per page without auto-erase
Read Operations
Read Operations
2 cycles
3 cycles
4 cycles
2 cycles
3 cycles
4 cycles
1 cycle
1 cycle
Table 40-32
Table 40-32
and
Table 40-33
and
Table 40-33
Maximum Operating Frequency (MHz)
Maximum Operating Frequency (MHz)
Min
15
but is limited by the Embedded Flash access
give the device maximum operating fre-
SAM7SE512/256/32
48.2
48.2
25
44
30
55
55
55
Max
6
3
Units
ms
ms
ms
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