ATSAM3S2AA-MU Atmel, ATSAM3S2AA-MU Datasheet - Page 391
ATSAM3S2AA-MU
Manufacturer Part Number
ATSAM3S2AA-MU
Description
IC MCU 32BIT 128KB FLASH 48QFN
Manufacturer
Atmel
Series
SAM3Sr
Specifications of ATSAM3S2AA-MU
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
34
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
32K x 8
Voltage - Supply (vcc/vdd)
1.62 V ~ 1.95 V
Data Converters
A/D 8x10/12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-VQFN Exposed Pad, 48-HVQFN, 48-SQFN, 48-DHVQFN
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
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- Download datasheet (24Mb)
23.13 Slow Clock Mode
23.13.1
Figure 23-28. Read/Write Cycles in Slow Clock Mode
6500C–ATARM–8-Feb-11
A[23:0]
NWE
MCK
NCS
Slow Clock Mode Waveforms
1
SLOW CLOCK MODE WRITE
The SMC is able to automatically apply a set of “slow clock mode” read/write waveforms when
an internal signal driven by the Power Management Controller is asserted because MCK has
been turned to a very slow clock rate (typically 32kHz clock rate). In this mode, the user-pro-
grammed waveforms are ignored and the slow clock mode waveforms are applied. This mode is
provided so as to avoid reprogramming the User Interface with appropriate waveforms at very
slow clock rate. When activated, the slow mode is active on all chip selects.
Figure 23-28
chip selects.
Table 23-4.
Read Parameters
NRD_SETUP
NRD_PULSE
NCS_RD_SETUP
NCS_RD_PULSE
NRD_CYCLE
NWE_CYCLE = 3
1
Table 23-4
illustrates the read and write operations in slow clock mode. They are valid on all
Read and Write Timing Parameters in Slow Clock Mode
1
indicates the value of read and write parameters in slow clock mode.
Duration (cycles)
1
1
0
2
2
Write Parameters
NWE_SETUP
NWE_PULSE
NCS_WR_SETUP
NCS_WR_PULSE
NWE_CYCLE
A[23:0]
MCK
NRD
NCS
SAM3S Preliminary
SLOW CLOCK MODE READ
1
NRD_CYCLE = 2
1
Duration (cycles)
1
1
0
3
3
391
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