AT91FR40162SB-CU-999 Atmel, AT91FR40162SB-CU-999 Datasheet - Page 56

• Manufacturer Part Number: AT91FR40162SB-CU-999
• Description: IC MCU 32BIT RISC 121BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91FR40162SB-CU-999

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 75MHz
• Connectivity: EBI/EMI, UART/USART
• Peripherals: WDT
• Number Of I /o: 32
• Program Memory Size: 2MB (1M x 16)
• Program Memory Type: FLASH
• Ram Size: 256K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 121-BGA
• Data Bus Width: 32 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

12.3.5
12.3.6
12.3.7
12.3.8
12.3.9
56
AT91FR40162SB
Product Identification
128-bit Protection Register
RDY/BUSY
Common Flash Interface (CFI)
Hardware Data Protection
The product identification mode identifies the device and manufacturer as Atmel. It is accessed
using a software operation.
For details, see
on page
The Flash Memory contains a 128-bit register that can be used for security purposes in system
design. The protection register is divided into two 64-bit blocks. The two blocks are designated
as block A and block B. The data in block A is non-changeable and is programmed at the factory
with a unique number. The data in block B is programmed by the user and can be locked out
such that data in the block cannot be reprogrammed. To program block B in the protection
register, the four-bus cycle Program Protection Register command must be used as shown in
the
Lock Protection Register command must be used as shown in the
Data bit D1 must be zero during the fourth bus cycle. All other data bits during the fourth bus
cycle are don’t cares. To determine whether block B is locked out, the Product ID Entry com-
mand is given followed by a read operation from address 80H. If data bit D1 is zero, block B is
locked. If data bit D1 is one, block B can be reprogrammed. See
address locations in the protection register. To read the protection register, the Product ID Entry
command is given followed by a normal read operation from an address within the protection
register. After determining whether block B is protected or not, or reading the protection register,
the Product ID Exit command must be given prior to performing any other operation.
An open-drain READY/BUSY output pin provides another method of detecting the end of a pro-
gram or erase operation. RDY/BUSY is actively pulled low during the internal program and erase
cycles and is released at the completion of the cycle. The open-drain connection allows for OR-
tying of several devices to the same RDY/BUSY line. See
page 62
CFI is a published, standardized data structure that may be read from a flash device. CFI allows
system software to query the installed device to determine the configurations, various electrical
and timing parameters, and functions supported by the device. CFI is used to allow the system
to learn how to interface to the flash device most optimally. The two primary benefits of using
CFI are ease of upgrading and second source availability. The command to enter the CFI Query
mode is a one-bus cycle command which requires writing data 98h to address 55h. The CFI
Query command can be written when the device is ready to read data or can also be written
when the part is in the product ID mode. Once in the CFI Query mode, the system can read CFI
data at the addresses given in
exit the CFI Query mode, the product ID exit command must be given.
The Hardware Data Protection feature protects against inadvertent programs to the Flash Mem-
ory in the following ways: (a) V
inhibited. (b) Program inhibit: holding any one of OE low, CE high or WE high inhibits program
cycles.
Table 12-2, “Command Definition Table,” on page
66.
for more details.
“Software Product Identification Entry”
Table 12-5, “Common Flash Interface Definition,” on page
CC
sense: if V
CC
is below 1.8V (typical), the program function is
63. To lock out block B, the four-bus cycle
and
“Software Product Identification Exit”
Table 12-1, “Status Bit Table,” on
Table 12-3 on page 64
“Command Definition Table”
6410B–ATARM–12-Jan-10
for the
68. To
.