AT32UC3A1512-AUR Atmel, AT32UC3A1512-AUR Datasheet - Page 393

• Manufacturer Part Number: AT32UC3A1512-AUR
• Description: MCU 32BIT 512KB FLASH 100-TQFP
• Manufacturer: Atmel
• Series: AVR®32 UC3r

Specifications of AT32UC3A1512-AUR

• Core Processor: AVR
• Core Size: 32-Bit
• Speed: 66MHz
• Connectivity: Ethernet, I²C, SPI, SSC, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 69
• Program Memory Size: 512KB (512K 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-TQFP, 100-VQFP
• For Use With: ATAVRONEKIT - KIT AVR/AVR32 DEBUGGER/PROGRMMR770-1008 - ISP 4PORT ATMEL AVR32 MCU SPIATSTK600-TQFP100 - STK600 SOCKET/ADAPTER 100-TQFPATEVK1100 - KIT DEV/EVAL FOR AVR32 AT32UC3A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

27.6.7.2
Figure 27-27. Write Access with NWAIT Assertion in Frozen Mode (EXNW_MODE = 10).
32058J–AVR32–04/11
Internally synchronized
NWAIT signal
NBS0, NBS1,
CLK_SMC
A0, A1
A[25:2]
D[15:0]
NWAIT
NWE
Frozen Mode
NCS
6
When the external device asserts the NWAIT signal (active low), and after internal synchroniza-
tion of this signal, the SMC state is frozen, i.e., SMC internal counters are frozen, and all control
signals remain unchanged. When the resynchronized NWAIT signal is deasserted, the SMC
completes the access, resuming the access from the point where it was stopped. See
27. This mode must be selected when the external device uses the NWAIT signal to delay the
access and to freeze the SMC.
The assertion of the NWAIT signal outside the expected period is ignored as illustrated in
27-28.
4
5
4
3
3
2
1
2
EXNW_MODE = 10 (Frozen)
WRITE_MODE = 1 (NWE_controlled)
NWE_PULSE = 5
NCS_WR_PULSE = 7
Write cycle
1
2
FROZEN STATE
1
2
1
2
0
0
AT32UC3A
Figure 27-
Figure
393