AT90PWM216 Atmel Corporation, AT90PWM216 Datasheet - Page 47

• Manufacturer Part Number: AT90PWM216
• Manufacturer: Atmel Corporation

Specifications of AT90PWM216

• Flash (kbytes): 16 Kbytes
• Pin Count: 24
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 19
• Ext Interrupts: 4
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 125
• Analog Comparators: 2
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 105
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 12
• Input Capture Channels: 1
• Pwm Channels: 7
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

9.5
7710F–AVR–09/11
Brown-out Detection
Figure 9-4.
AT90PWM216/316 has an On-chip Brown-out Detection (BOD) circuit for monitoring the V
level during operation by comparing it to a fixed trigger level. The trigger level for the BOD can
be selected by the BODLEVEL Fuses. The trigger level has a hysteresis to ensure spike free
Brown-out Detection. The hysteresis on the detection level should be interpreted as V
V
Table 9-2.
Notes:
Table 9-3.
Notes:
Symbol
V
t
BOT
BOD
HYST
+ V
BODLEVEL 2..0 Fuses
1. V
2. Values are guidelines only.
1. Values are guidelines only.
HYST
this is the case, the device is tested down to V
antees that a Brown-Out Reset will occur before V
operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL = 010 for Low Operating Voltage and BODLEVEL = 101 for High Operating Volt-
age .
BOT
/2 and V
External Reset During Operation
BODLEVEL Fuse Coding
Brown-out Characteristics
Parameter
Brown-out Detector Hysteresis
Min Pulse Width on Brown-out Reset
CC
may be below nominal minimum operating voltage for some devices. For devices where
111
110
101
100
011
010
001
000
BOT-
= V
BOT
- V
HYST
Min V
(1)(2)
/2.
(1)
2.5
4
BOT
CC
= V
Typ V
CC
Min.
4.5
2.7
4.3
4.4
4.2
2.8
2.6
BOT
drops to a voltage where correct
BOD Disabled
BOT
AT90PWM216/316
during the production test. This guar-
Typ.
70
2
Max V
2.9
4.4
Max.
BOT
Units
Units
mV
BOT+
V
V
V
V
V
V
V
µs
47
CC
=