at91sam7l128 ATMEL Corporation, at91sam7l128 Datasheet - Page 28

• Manufacturer Part Number: at91sam7l128
• Description: At91 Arm Thumb-based Microcontroller
• Manufacturer: ATMEL Corporation

8.1.2.7
8.1.3
8.1.4
28
AT91SAM7L128/64 Preliminary
Fast Flash Programming Interface
SAM-BA Boot
GPNVM Bits
The AT91SAM7L128/64 features two GPNVM bits that can be cleared or set respectively
through the commands “Clear GPNVM Bit” and “Set GPNVM Bit” of the EEFC User Interface..
Table 8-1.
The Fast Flash Programming Interface allows programming the device through either a serial
JTAG interface or through a multiplexed fully-handshaked parallel port. It allows gang program-
ming with market-standard industrial programmers.
The FFPI supports read, page program, page erase, full erase, lock, unlock and protect
commands.
The Fast Flash Programming Interface is enabled and the Fast Programming Mode is entered
when TST and CLKIN are tied high while FWUP is tied low.
The Flash contains a 128-byte write buffer, accessible through a 32-bit interface.
The SAM-BA Boot is a default Boot Program which provides an easy way to program in-situ the
on-chip Flash memory.
The SAM-BA Boot Assistant supports serial communication via the DBGU.
The SAM-BA Boot provides an interface with SAM-BA Graphic User Interface (GUI).
The SAM-BA Boot resides in ROM and is mapped at address 0x0 when GPNVM bit 1 is set to 0.
GPNVMBit[#]
0
1
• The Flash of the AT91SAM7L128 is organized in 512 pages of 256 bytes (single plane).
• The Flash of the AT91SAM7L64 is organized in 256 pages of 256 bytes (single plane).
General-purpose Non-volatile Memory Bits
Function
Security bit
Boot mode selection
6257AS–ATARM–28-Feb-08