AT91SAM7X128 Atmel, AT91SAM7X128 Datasheet - Page 107

• 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

AT91SAM7X512/256/128 Preliminary
To run one of these commands, the field FCMD of the MC_FCR register has to be written with
the command number. As soon as the MC_FCR register is written, the FRDY flag is automati-
cally cleared. Once the current command is achieved, then the FRDY flag is automatically set. If
an interrupt has been enabled by setting the bit FRDY in MC_FMR, the interrupt line of the Mem-
ory Controller is activated.
All the commands are protected by the same keyword, which has to be written in the eight high-
est bits of the MC_FCR register.
Writing MC_FCR with data that does not contain the correct key and/or with an invalid command
has no effect on the memory plane; however, the PROGE flag is set in the MC_FSR register.
This flag is automatically cleared by a read access to the MC_FSR register.
When the current command writes or erases a page in a locked region, the command has no
effect on the whole memory plane; however, the LOCKE flag is set in the MC_FSR register. This
flag is automatically cleared by a read access to the MC_FSR register.
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