ATmega16A Atmel Corporation, ATmega16A Datasheet - Page 38
ATmega16A
Manufacturer Part Number
ATmega16A
Description
Manufacturer
Atmel Corporation
Specifications of ATmega16A
Flash (kbytes)
16 Kbytes
Pin Count
44
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
32
Ext Interrupts
3
Usb Speed
No
Usb Interface
No
Spi
1
Twi (i2c)
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
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 85
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
4
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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10.1.2
38
ATmega16A
Power-on Reset
Figure 10-1. Reset Logic
A Power-on Reset (POR) pulse is generated by an On-chip detection circuit. The detection level
is defined in
V
well as to detect a failure in supply voltage.
A Power-on Reset (POR) circuit ensures that the device is reset from Power-on. Reaching the
Power-on Reset threshold voltage invokes the delay counter, which determines how long the
device is kept in RESET after V
when V
Figure 10-2. MCU Start-up, RESET Tied to V
CC
is below the detection level. The POR circuit can be used to trigger the Start-up Reset, as
CC
INTERNAL
TIME-OUT
decreases below the detection level.
RESET
RESET
V
“System and Reset Characteristics” on page
CC
BODLEVEL
BODEN
JTAG Reset
Pull-up Resistor
Register
FILTER
SPIKE
V
V
POT
RST
CC
t
rise. The RESET signal is activated again, without any delay,
CKSEL[3:0]
TOUT
Reset Circuit
Reset Circuit
SUT[1:0]
Reset Circuit
Brown-out
Watchdog
Watchdog
Oscillator
Generator
Power-on
Timer
Clock
CK
MCU Control and Status
Register (MCUCSR)
CC
DATA BUS
.
Delay Counters
296. The POR is activated whenever
TIMEOUT
8154B–AVR–07/09
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