AT91FR40162S ATMEL Corporation, AT91FR40162S Datasheet - Page 12

• Manufacturer Part Number: AT91FR40162S
• Description: MicroControllers
• Manufacturer: ATMEL Corporation

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AT91 Flash Memory Uploader (FMU) Software
AT91FR40162S
Flash Memory Uploader Operations
The following hardware features protect against inadvertent programming of the Flash
memory:
All Flash-based AT91 devices are delivered with pre-programmed software called the AT91
Flash Memory Uploader, which resides in the first sector of the embedded Flash. The Flash
Memory Uploader allows programming to the embedded flash through a serial port. Either of
the on-chip USARTs can be used by the Flash Memory Uploader. The purpose of the AT91
Flash Memory Uploader is to provide a Flash programming solution during small and medium
productiion. The FMU is “one-time usable”. This means that once the customer’s code is writ-
ten in sector 0 of the Flash, the FMU is overwritten. If IAP functionality is needed, customers
need to use the JTAG port or implement their own boot loader with IAP capability.
Figure 6-1.
The Flash Memory Uploader requires the encapsulated Flash to be used as the
AT91FR40162S boot memory and a valid clock to be applied to MCKI. After reset, the Flash
Memory Uploader immediately recopies itself into the internal SRAM and jumps to it. The fol-
lowing operation requires this memory resource only. External accesses are performed only to
program the encapsulated Flash.
• VDDIO Sense – if VDDIO is below a certain level, the program function is inhibited.
• VDDIO Power-on Delay – once VDDIO has reached the VDDIO sense level, the device will
• Program Inhibit – holding any one of OE low, CE high or WE high inhibits program cycles.
• Noise Filter – pulses of less than a certain duration on the WE or CE inputs will not initiate
automatically time out a certain duration before programming.
a program cycle.
AT91FR40162S
Flash Memory
AT91R40008
Flash Memory Uploader
USART1
USART0
RXD0
RXD1
Target System
NCSF
NCS0
RS232
Driver
Programming System
6174AS–ATARM–25-May-05
Serial
Port