AT90PWM3B-16SU Atmel, AT90PWM3B-16SU Datasheet - Page 48

• Manufacturer Part Number: AT90PWM3B-16SU
• Description: IC MCU AVR RISC 8K FLASH 32-SOIC
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM3B-16SU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 27
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 32-SOIC (7.5mm Width)
• Processor Series: AT90PWMx
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SPI/USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 27
• Number Of Timers: 2
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRFBKIT, ATAVRISP2
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 11-ch x 10-bit
• On-chip Dac: 1-chx10-bit
• Controller Family/series: AVR PWM
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 512Byte
• Cpu Speed: 16MHz
• Rohs Compliant: Yes
• For Use With: ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRMC200 - KIT EVAL FOR AT90PWM3 ASYNCATAVRFBKIT - KIT DEMO BALLAST FOR AT90PWM2ATAVRISP2 - PROGRAMMER AVR IN SYSTEMATSTK520 - ADAPTER KIT FOR 90PWM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.0.5
48
AT90PWM2/2B/3/3B
Brown-out Detection
AT90PWM2/2B/3/3B 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:
When the BOD is enabled, and V
9-5), the Brown-out Reset is immediately activated. When V
(V
expired.
The BOD circuit will only detect a drop in V
longer than t
Symbol
V
t
BOT
BOD
BOT+
HYST
+ V
BODLEVEL 2..0 Fuses
in
1. V
2. Values are guidelines only.
1. Values are guidelines only.
HYST
Figure
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 .
BOD
BOT
/2 and V
BODLEVEL Fuse Coding
Brown-out Characteristics
Parameter
Brown-out Detector Hysteresis
Min Pulse Width on Brown-out Reset
101
100
010
001
000
may be below nominal minimum operating voltage for some devices. For devices where
111
110
011
given in
9-5), the delay counter starts the MCU after the Time-out period t
BOT-
Table
= V
BOT
9-3.
- V
CC
HYST
decreases to a value below the trigger level (V
Min V
(1)(2)
/2.
(1)
BOT
CC
if the voltage stays below the trigger level for
CC
4.2
2.8
2.6
Typ V
= V
Min.
4.5
2.7
4.3
4.4
BOT
BOD Disabled
CC
CC
BOT
during the production test. This guar-
increases above the trigger level
drops to a voltage where correct
Typ.
70
2
Max V
Max.
BOT
4317H–AVR–12/06
BOT-
TOUT
in
Units
Units
mV
BOT+
Figure
V
V
V
V
V
V
V
µs
has
CC
=