AT32UC3B1128 Atmel Corporation, AT32UC3B1128 Datasheet - Page 47

• 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

Table 9-4.
9.5.11.1
9.5.11.2
32059L–AVR32–01/2012
CPU/HSB/PBA/PBB
(excluding Power Manager)
32 KHz oscillator
RTC control register
GPLP registers
Watchdog control register
Voltage Calibration register
RC Oscillator Calibration register
BOD control register
Bandgap control register
Clock control registers
Osc0/Osc1 and control registers
PLL0/PLL1 and control registers
OCD system and OCD registers
Brown-Out Detector
Power-On Detector
Effect of the different reset events
Table 9-4
The cause of the last reset can be read from the RCAUSE register. This register contains one bit
for each reset source, and can be read during the boot sequence of an application to determine
the proper action to be taken.
The Power-On Detector monitors the VDDCORE supply pin and generates a reset when the
device is powered on. The reset is active until the supply voltage from the linear regulator is
above the power-on threshold level. The reset will be re-activated if the voltage drops below the
power-on threshold level. See Electrical Characteristics for parametric details.
The Brown-Out Detector (BOD) monitors the VDDCORE supply pin and compares the supply
voltage to the brown-out detection level, as set in BOD.LEVEL. The BOD is disabled by default,
but can be enabled either by software or by flash fuses. The Brown-Out Detector can either gen-
erate an interrupt or a reset when the supply voltage is below the brown-out detection level. In
any case, the BOD output is available in bit POSCR.BODET bit.
Note 1 : Any change to the BOD.LEVEL field of the BOD register should be done with the BOD
deactivated to avoid spurious reset or interrupt.
Note 2 : If the BOD level is set to a value higher than VDDCORE and enabled by fuses, the part
will be in constant reset. In order to leave reset state, an external voltage higher than the BOD
level should be applied. Thus, it is possible to disable BOD.
Power-On
Reset
lists parts of the device that are reset, depending on the reset source.
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
External
Reset
Y
N
N
N
Y
N
N
Y
Y
Y
Y
Y
Y
Watchdog
Reset
Y
N
N
N
N
N
N
N
N
Y
Y
Y
N
BOD
Reset
N
N
N
N
N
N
N
Y
Y
Y
Y
Y
Y
CPU Error
Reset
N
N
N
N
N
N
N
Y
Y
Y
Y
Y
Y
OCD
Reset
N
N
N
N
N
N
N
N
Y
Y
Y
Y
Y
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