AT91SAM7X256B-CU Atmel, AT91SAM7X256B-CU Datasheet - Page 109
![IC MCU 256KB FLASH 100TFBGA](/photos/6/89/68968/313-100-cbga_sml.jpg)
AT91SAM7X256B-CU
Manufacturer Part Number
AT91SAM7X256B-CU
Description
IC MCU 256KB FLASH 100TFBGA
Manufacturer
Atmel
Series
AT91SAMr
Specifications of AT91SAM7X256B-CU
Core Processor
ARM7
Core Size
16/32-Bit
Speed
55MHz
Connectivity
CAN, Ethernet, I²C, SPI, SSC, UART/USART, USB
Peripherals
Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number Of I /o
62
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
64K x 8
Voltage - Supply (vcc/vdd)
1.65 V ~ 1.95 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TFBGA
Processor Series
91S
Core
ARM7TDMI
Data Bus Width
32 bit
Data Ram Size
64 KB
Interface Type
CAN, Ethernet, SPI, I2S, TWI, USART, USB
Maximum Clock Frequency
55 MHz
Number Of Programmable I/os
62
Number Of Timers
3
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Operating Temperature Range
- 40 C to + 85 C
Package
100TFBGA
Device Core
ARM7TDMI
Family Name
91S
Maximum Speed
55 MHz
On-chip Adc
8-chx10-bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
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Manufacturer
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Figure 19-6. Example of Partial Page Programming:
19.2.4.2
6120H–ATARM–17-Feb-09
16 words
16 words
16 words
16 words
Erase All Command
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
Erase All Flash
Page 7 erased
32 bits wide
Step 1.
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
...
...
...
...
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
After programming, the page (the whole lock region) can be locked to prevent miscellaneous
write or erase sequences. The lock bit can be automatically set after page programming using
WPL.
Data to be written are stored in an internal latch buffer. The size of the latch buffer corresponds
to the page size. The latch buffer wraps around within the internal memory area address space
and appears to be repeated by the number of pages in it.
Note:
Data are written to the latch buffer before the programming command is written to the Flash
Command Register MC_FCR. The sequence is as follows:
Two errors can be detected in the MC_FSR register after a programming sequence:
The entire memory can be erased if the Erase All Command (EA) in the Flash Command Regis-
ter MC_FCR is written.
• Write the full page, at any page address, within the internal memory area address space
• Programming starts as soon as the page number and the programming command are written
• When programming is completed, the bit FRDY in the Flash Programming Status Register
• Programming Error: A bad keyword and/or an invalid command have been written in the
• Lock Error: The page to be programmed belongs to a locked region. A command must be
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
using only 32-bit access.
to the Flash Command Register. The FRDY bit in the Flash Programming Status Register
(MC_FSR) is automatically cleared.
(MC_FSR) rises. If an interrupt was enabled by setting the bit FRDY in MC_FMR, the
interrupt line of the Memory Controller is activated.
MC_FCR register.
previously run to unlock the corresponding region.
Writing of 8-bit and 16-bit data is not allowed and may lead to unpredictable data corruption.
Programming of the second part of Page 7
AT91SAM7X512/256/128 Preliminary
FF
FF
FF
CA FE
CA FE
CA FE
FF
FF
FF
FF
FF
FF
(NEBP = 1)
32 bits wide
FF
FF
FF
FF
FF
FF
FF
FF
FF
Step 2.
...
...
...
...
CA
CA
CA
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FF
FE
FE
FE
Programming of the third part of Page 7
CA FE
CA FE
CA FE
FF
FF
FF
DE CA
DE CA
DE CA
FF
FF
FF
(NEBP = 1)
32 bits wide
FF
FF
FF
FF
FF
FF
Step 3.
...
...
...
...
CA
CA
CA
FF
FF
FF
DE CA
DE CA
DE CA
FF
FF
FF
FF
FF
FF
FE
FE
FE
FF
FF
FF
109
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