AT91SAM7X256B-AU Atmel, AT91SAM7X256B-AU Datasheet - Page 627

• Manufacturer Part Number: AT91SAM7X256B-AU
• Description: IC MCU 256KB FLASH 100LQFP
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7X256B-AU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 55MHz
• Connectivity: CAN, Ethernet, I²C, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 62
• 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: 100-LQFP
• Package: 100LQFP
• Device Core: ARM7TDMI
• Family Name: 91S
• Maximum Speed: 55 MHz
• Operating Supply Voltage: 1.8|3.3 V
• Data Bus Width: 32 Bit
• Number Of Programmable I/os: 62
• Interface Type: CAN/Ethernet/SPI/I2S/TWI/USART/USB
• On-chip Adc: 8-chx10-bit
• Number Of Timers: 3
• Controller Family/series: AT91SAM7xxxxx
• No. Of I/o's: 62
• Ram Memory Size: 64KB
• Cpu Speed: 55MHz
• No. Of Timers: 1
• Rohs Compliant: Yes
• Cpu Family: 91S
• Device Core Size: 32b
• Frequency (max): 55MHz
• Total Internal Ram Size: 64KB
• # I/os (max): 62
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 1.8/3.3V
• Operating Supply Voltage (max): 1.95/3.6V
• Operating Supply Voltage (min): 1.65/3V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 100
• Package Type: LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Compliant

38.8
38.8.1
Table 38-19. Master Clock Waveform Parameters
38.8.2
Criteria used to define the maximum frequency of the I/Os:
output duty cycle (30%-70%)
minimum output swing: 100mV to VDDIO - 100mV
Addition of rising and falling time inferior to 75% of the period
Table 38-20. I/O Characteristics
Notes:
6120H–ATARM–17-Feb-09
Symbol
1/(t
Symbol
FreqMax
PulseminH
PulseminL
FreqMax
PulseminH
PulseminL
FreqMax
PulseminH
PulseminL
CPMCK
AC Characteristics
1. Pin Group 1 = PB27 to PB30
2. Pin Group 2 = PA4 to PA30 and PB0 to PB30
3. Pin Group 3 = PA0 to PA3
4. V
5. V
I01
I02
I03
)
Master Clock Characteristics
I/O Characteristics
I01
I02
I03
I01
I02
I03
VDDIO
VDDIO
Parameter
Pin Group 1
Pin Group 1
Pin Group 1
Pin Group 2
Pin Group 2
Pin Group 2
Pin Group 3
Pin Group 3
Pin Group 3
Parameter
Master Clock Frequency
from 3.0V to 3.6V, maximum external capacitor = 40pF
from 3.0V to 3.6V, maximum external capacitor = 20pF
(1)
(1)
(1)
(2)
(2)
(2)
(3)
(3)
(3)
frequency
High Level Pulse Width
frequency
High Level Pulse Width
Low Level Pulse Width
frequency
Low Level Pulse Width
High Level Pulse Width
Low Level Pulse Width
AT91SAM7X512/256/128 Preliminary
Conditions
Load: 40 pF
Load: 40 pF
Load: 40 pF
Load: 40 pF
Load: 20 pF
Load: 40 pF
Load: 20 pF
Load: 40 pF
Load: 20 pF
Load: 40 pF
Load: 40 pF
Load: 40 pF
Conditions
(4)
(4)
(4)
(4)
(5)
(4)
(5)
(4)
(5)
(4)
(4)
(4)
Min
16.6
16.6
Min
40
40
20
10
20
10
Max
Max
12.5
55
25
30
30
Units
MHz
MHz
MHz
MHz
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
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