AT91SAM7SE256-CU Atmel, AT91SAM7SE256-CU Datasheet - Page 641

• Manufacturer Part Number: AT91SAM7SE256-CU
• Description: IC ARM7 MCU FLASH 256K 144-LFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7SE256-CU

• 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: 144-LFBGA
• Processor Series: AT91SAMx
• Core: ARM7TDMI
• Data Bus Width: 32 bit
• Data Ram Size: 32 KB
• Interface Type: EBI, SPI, TWI, USART
• Maximum Clock Frequency: 48 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Operating Supply Voltage: 1.8 V to 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JTRACE-ARM-2M, KSK-AT91SAM7S-PL, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: AT91SAM-ICE, AT91-ISP, AT91SAM7SE-EK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• For Use With: AT91SAM7SE-EK - EVAL BOARD FOR AT91SAM7SEAT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: AT91SAM7SE256-CJ; AT91SAM7SE256-CJ

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
SAM7SE512/256/32 Preliminary
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-
48.2
48.2
25
44
30
55
55
55
Max
6
3
Units
ms
ms
ms
641