AT91SAM9261-CJ-999 Atmel, AT91SAM9261-CJ-999 Datasheet - Page 698
AT91SAM9261-CJ-999
Manufacturer Part Number
AT91SAM9261-CJ-999
Description
IC MCU ARM9 ULTRA LP 217LFBGA
Manufacturer
Atmel
Series
AT91SAMr
Datasheet
1.AT91SAM9261-CJ-999.pdf
(749 pages)
Specifications of AT91SAM9261-CJ-999
Core Processor
ARM9
Core Size
16/32-Bit
Speed
190MHz
Connectivity
EBI/EMI, I²C, MMC, SPI, SSC, UART/USART, USB
Peripherals
DMA, LCD, POR, PWM, WDT
Number Of I /o
96
Program Memory Size
32KB (32K x 8)
Program Memory Type
ROM
Ram Size
192K x 8
Voltage - Supply (vcc/vdd)
1.08 V ~ 1.32 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
217-LFBGA
For Use With
AT91SAM9261-EK - KIT EVAL FOR AT91SAM926EJ-SAT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
- Current page: 698 of 749
- Download datasheet (12Mb)
42.2.8
42.2.8.1
698
AT91SAM9261 Preliminary
Reset Controller (RSTC)
RSTC: Reset During SDRAM Accesses
When a User Reset occurs during SDRAM read access, the SDRAM clock is turned off while
data are ready to be read on the data bus. The SDRAM maintains the data until the clock
restarts.
If the user Reset is programmed to assert a general reset, the data maintained by the SDRAM
leads to a data bus conflict and adversely affects the boot memories connected on the EBI:
In the interrupt routine, Power Down SDRAM properly and perform Peripheral and Processor
Reset with software in assembler.
Example with libV3.
• NAND Flash boot functionality, if the system boots out of internal ROM.
• NOR Flash boot, if the system boots on an external memory connected on the EBI CS0.
1. Avoid User Reset to generate a system reset.
2. Trap the User Reset with an interrupt.
• The main code:
• The C SYS handler:
Problem Fix/Workaround
//user reset interrupt setting
*AT91C_RSTC_RMR = (0xA5<<24) | (0x4<<8) | AT91C_RSTC_URSTIEN;
extern void soft_user_reset(void);
void sysc_handler(void){
//check if interrupt comes from RSTC
}
// Configure AIC controller to handle SSC interrupts
AT91F_AIC_ConfigureIt (
// Enable SYSC interrupt in AIC
AT91F_AIC_EnableIt(AT91C_BASE_AIC, AT91C_ID_SYS);
soft_user_reset();
//never reached
while(1);
if( (*AT91C_RSTC_RSR & AT91C_RSTC_URSTS ) == AT91C_RSTC_URSTS){
}
AT91C_BASE_AIC,
AT91C_ID_SYS,
AT91C_AIC_PRIOR_HIGHEST,
AT91C_AIC_SRCTYPE_INT_EDGE_TRIGGERED, // Level sensitive
sysc_handler );
// System peripheral ID
// AIC base address
// Max priority
6062M–ATARM–23-Mar-09
Related parts for AT91SAM9261-CJ-999
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
IC ARM9 MPU 217BGA
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
KIT EVAL FOR AT91SAM926EJ-S
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
MCU, MPU & DSP Development Tools KICKSTART KIT FOR AT91SAM9 PLUS
Manufacturer:
IAR Systems
Part Number:
Description:
DEV KIT FOR AVR/AVR32
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet: