ATSAM3S1BA-AU Atmel, ATSAM3S1BA-AU Datasheet - Page 365

• Manufacturer Part Number: ATSAM3S1BA-AU
• Description: IC MCU 32BIT 64KB FLASH 64LQFP
• Manufacturer: Atmel
• Series: SAM3Sr

Specifications of ATSAM3S1BA-AU

• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 64MHz
• Connectivity: I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
• Number Of I /o: 47
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.62 V ~ 1.95 V
• Data Converters: A/D 10x10/12b, D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-LQFP
• Controller Family/series: ATSAM3S
• No. Of I/o's: 47
• Ram Memory Size: 16KB
• Cpu Speed: 64MHz
• No. Of Timers: 6
• Rohs Compliant: Yes
• Processor Series: ATSAM3x
• Core: ARM Cortex M3
• 3rd Party Development Tools: JTRACE-CM3, MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: ATSAM3S-EK
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Figure 23-4. Standard and “CE don’t care” NAND Flash Application Examples
6500C–ATARM–8-Feb-11
SMC
PIO
PIO
D[7:0]
A[22:21]
NANDOE
NANDWE
NCSx
The address latch enable and command latch enable signals on the NAND Flash device are
driven by address bits A22 and A21of the address bus. Any bit of the address bus can also be
used for this purpose. The command, address or data words on the data bus of the NAND Flash
d e v i c e u s e th e i r o w n a d dr e s s e s w i th i n t h e N C S x a d d r es s s p a c e (c o n fi gu r e d b y
CCFG_SMCNFCS Register on the Bus Matrix User Interface). The chip enable (CE) signal of
the device and the ready/busy (R/B) signals are connected to PIO lines. The CE signal then
remains asserted even when NCS3 is not selected, preventing the device from returning to
standby mode. The NANDCS output signal should be used in accordance with the external
NAND Flash device type.
Two types of CE behavior exist depending on the NAND flash device:
Figure 23-4
Not Connected
• PIO Input with pull-up enabled (default state after reset)
• PIO Output set at level 1
• Standard NAND Flash devices require that the CE pin remains asserted Low continuously
• This restriction has been removed for “CE don’t care” NAND Flash devices. The NCSx signal
during the read busy period to prevent the device from returning to standby mode. Since the
SAM3S Static Memory Controller (SMC) asserts the NCSx signal High, it is necessary to
connect the CE pin of the NAND Flash device to a GPIO line, in order to hold it low during the
busy period preceding data read out.
can be directly connected to the CE pin of the NAND Flash device.
illustrates both topologies: Standard and “CE don’t care” NAND Flash.
CE
R/B
ALE
CLE
NOE
NWE
AD[7:0]
NAND Flash
SMC
PIO
D[7:0]
A[22:21]
NANDOE
NANDWE
NCSx
SAM3S Preliminary
CE
“CE don’t care”
NAND Flash
R/B
ALE
CLE
NOE
NWE
AD[7:0]
365