AT91SAM7X128 Atmel, AT91SAM7X128 Datasheet - Page 136

• Manufacturer Part Number: AT91SAM7X128
• Description: MCU 32-Bit 91S ARM7TDMI RISC 128KB Flash 1.8V/3.3V 100-Pin LQFP
• Manufacturer: Atmel

Specifications of AT91SAM7X128

• Package: 100LQFP
• Device Core: ARM7TDMI
• Family Name: 91S
• Maximum Speed: 55 MHz
• Ram Size: 32 KB
• Program Memory Size: 128 KB
• Operating Supply Voltage: 1.8|3.3 V
• Data Bus Width: 32 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 62
• Interface Type: CAN/Ethernet/SPI/I2S/TWI/USART/USB
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

21.4
136
SAM-BA Boot
AT91SAM7X512/256/128 Preliminary
The SAM-BA boot principle is to:
Figure 21-2. AutoBaudrate Flow Diagram
– Check if USB Device enumeration has occurred
– Check if the AutoBaudrate sequence has succeeded (see
– Once the communication interface is identified, the application runs in an infinite
loop waiting for different commands as in
Send Character '>'
Run SAM-BA Boot
Character '0x80'
Character '0x80'
Character '#'
Yes
Yes
Yes
received ?
received ?
received ?
Device
Setup
No
No
No
Table
21-1.
Test Communication
1st measurement
2nd measurement
UART operational
Figure
21-2)
6120H–ATARM–17-Feb-09