AT32UC3A3128 Atmel Corporation, AT32UC3A3128 Datasheet - Page 214

• Manufacturer Part Number: AT32UC3A3128
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A3128

• Flash (kbytes): 128 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 66 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 32
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 110
• Ext Interrupts: 110
• Usb Transceiver: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device + OTG
• Spi: 6
• Twi (i2c): 2
• Uart: 4
• Lin: 4
• Ssc: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 16
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 128
• Self Program Memory: YES
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.0 to 3.6
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 18
• Input Capture Channels: 12
• Pwm Channels: 12
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

15.7.3
Register Name:
Access Type:
Offset:
Reset Value:
• NRDCYCLE[8:0]: Total Read Cycle Length
• NWECYCLE[8:0]: Total Write Cycle Length
32072G–11/2011
31
23
15
–
–
7
The total read cycle length is the total duration in clock cycles of the read cycle. It is equal to the sum of the setup, pulse and
hold steps of the NRD and NCS signals. It is defined as:
The total write cycle length is the total duration in clock cycles of the write cycle. It is equal to the sum of the setup, pulse and
hold steps of the NWE and NCS signals. It is defined as:
Cycle Register
30
22
14
6
–
–
CYCLE
Read/Write
0x08 + CS_number*0x10
0x00030003
Write Cycle Length
Read Cycle Length
29
21
13
–
–
5
=
=
(
(
256 NWECYCLE 8:7
256 NRDCYCLE 8:7
×
×
28
20
12
4
–
–
NWECYCLE[7:0]
NRDCYCLE[7:0]
[
[
27
19
11
]
]
–
–
3
+
+
NWECYCLE 6:0
NRDCYCLE 6:0
[
[
26
18
10
2
–
–
]
]
) clock cycles
) clock cycles
25
17
–
9
–
1
NWECYCLE[8]
NRDCYCLE[8]
24
16
8
0
214