AT91SAM7S256C-MU Atmel, AT91SAM7S256C-MU Datasheet - Page 578

• Manufacturer Part Number: AT91SAM7S256C-MU
• Description: IC ARM7 MCU 32BIT 256K 64-QFN
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7S256C-MU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 55MHz
• Connectivity: I²C, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 64K 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: 64-VQFN Exposed Pad, 64-HVQFN, 64-SQFN, 64-DHVQFN
• Processor Series: AT91
• Core: ARM7TDMI
• Data Bus Width: 32 bit
• Data Ram Size: 64 KB
• Interface Type: SPI, TWI, USART, USB
• Maximum Clock Frequency: 55 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 5
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• For Use With: AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9AT91SAM7S-EK - KIT EVAL FOR ARM AT91SAM7S
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: AT91SAM7S256-MU; AT91SAM7S256-MU

37.10.3
The maximum operating frequency is given in
cessor is fetching code out of it.
the MC_FMR register. This field defines the number of wait states required to access the Embedded Flash Memory.
Table 37-24.
Notes:
Table 37-25. AC Flash Characteristics
578
Parameter
Program Cycle Time
Full Chip Erase
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.
AT91SAM7S Series Preliminary
Embedded Flash Characteristics
FWS
2
3
Embedded Flash Wait States
0
1
(2)
(2)
(1)
Conditions
per page including auto-erase
per page without auto-erase
Table 37-24
Read Operations
gives the device maximum operating frequency depending on the FWS field of
Table 37-24
2 cycles
3 cycles
4 cycles
1 cycle
but is limited by the Embedded Flash access time when the pro-
Maximum Operating Frequency (MHz)
Min
15
30
55
55
55
Max
6
3
6175K–ATARM–30-Aug-10
Units
ms
ms
ms