AT32UC3B1128 Atmel Corporation, AT32UC3B1128 Datasheet - Page 226

• Manufacturer Part Number: AT32UC3B1128
• Manufacturer: Atmel Corporation

Specifications of AT32UC3B1128

• Flash (kbytes): 128 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 60 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 32
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 28
• Ext Interrupts: 28
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 6
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.0-3.6 or (1.65-1.95+3.0-3.6)
• Operating Voltage (vcc): 3.0-3.6 or (1.65-1.95+3.0-3.6)
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 10
• Output Compare Channels: 16
• Input Capture Channels: 6
• Pwm Channels: 13
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

Figure 19-12. Master Read with One, Two or Three Bytes Internal Address and One Data Byte
19.10.7.2
Figure 19-13. Internal Address Usage
19.11 Using the Peripheral DMA Controller
32059L–AVR32–01/2012
TWD
TWD
TWD
Three bytes internal address
Two bytes internal address
One byte internal address
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10-bit Slave Addressing
DADR
DADR
DADR
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W
For a slave address higher than 7 bits, the user must configure the address size (IADRSZ) and
set the other slave address bits in the internal address register (IADR). The two remaining Inter-
nal address bytes, IADR[15:8] and IADR[23:16] can be used the same as in 7-bit Slave
Addressing.
Example: Address a 10-bit device:
(10-bit device address is b1 b2 b3 b4 b5 b6 b7 b8 b9 b10)
Figure 19-13
the use of internal addresses to access the device.
The use of the Peripheral DMA Controller significantly reduces the CPU load.
1. Program IADRSZ = 1,
2. Program DADR with 1 1 1 1 0 b1 b2 (b1 is the MSB of the 10-bit address, b2, etc.)
3. Program IADR with b3 b4 b5 b6 b7 b8 b9 b10 (b10 is the LSB of the 10-bit address)
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A
A
A
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S
B
Address
Device
IADR(23:16)
IADR(15:8)
IADR(7:0)
0
below shows a byte write to an Atmel AT24LC512 EEPROM. This demonstrates
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B
L
W
W
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E
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I
/
A
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K
WORD ADDRESS
A
A
A
M
S
B
FIRST
IADR(15:8)
Sr
IADR(7:0)
DADR
A
C
K
WORD ADDRESS
SECOND
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A
R
Sr
IADR(7:0)
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B
A
C
K
DADR
DATA
DATA
A
Sr
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C
K
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O
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N
A
DADR
DATA
P
DATA
R
N
P
N
A
P
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