ATSAM3S-EK Atmel, ATSAM3S-EK Datasheet - Page 346
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ATSAM3S-EK
Manufacturer Part Number
ATSAM3S-EK
Description
KIT EVAL FOR ATSAM3S4C
Manufacturer
Atmel
Series
SAM3Sr
Type
MCUr
Specifications of ATSAM3S-EK
Contents
Board, Cables, Power Supply
Silicon Manufacturer
Atmel
Core Architecture
ARM
Core Sub-architecture
Cortex-M3
Kit Contents
Board
Features
TFT Colour LCD Display, SD/MMC Interface
Svhc
No SVHC (15-Dec-2010)
Rohs Compliant
Yes
For Use With/related Products
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATSAM3S-EK
Manufacturer:
Atmel
Quantity:
135
- Current page: 346 of 1118
- Download datasheet (24Mb)
21.5.3.2
21.5.4
346
SAM3S Preliminary
In Application Programming (IAP) Feature
Communication Endpoints
There are two communication endpoints and endpoint 0 is used for the enumeration process.
Endpoint 1 is a 64-byte Bulk OUT endpoint and endpoint 2 is a 64-byte Bulk IN endpoint. SAM-
BA Boot commands are sent by the host through endpoint 1. If required, the message is split by
the host into several data payloads by the host driver.
If the command requires a response, the host can send IN transactions to pick up the response.
The IAP feature is a function located in ROM that can be called by any software application.
When called, this function sends the desired FLASH command to the EEFC and waits for the
Flash to be ready (looping while the FRDY bit is not set in the MC_FSR register).
Since this function is executed from ROM, this allows Flash programming (such as sector write)
to be done by code running in Flash.
The IAP function entry point is retrieved by reading the NMI vector in ROM (0x00800008).
This function takes one argument in parameter: the command to be sent to the EEFC.
This function returns the value of the MC_FSR register.
IAP software code example:
(unsigned int) (*IAP_Function)(unsigned long);
void main (void){
/* Initialize the function pointer (retrieve function address from NMI
vector) */
/* Send your data to the sector here */
/* build the command to send to EEFC */
/* Call the IAP function with appropriate command */
}
unsigned long FlashSectorNum = 200; //
unsigned long flash_cmd = 0;
unsigned long flash_status = 0;
unsigned long EFCIndex = 0; // 0:EEFC0, 1: EEFC1
IAP_Function = ((unsigned long) (*)(unsigned long)) 0x00800008;
flash_cmd =
flash_status = IAP_Function (EFCIndex, flash_cmd);
(0x5A << 24) | (FlashSectorNum << 8) | AT91C_MC_FCMD_EWP;
6500C–ATARM–8-Feb-11
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