ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 267
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ATmega32U2
Manufacturer Part Number
ATmega32U2
Description
Manufacturer
Atmel Corporation
Specifications of ATmega32U2
Flash (kbytes)
32 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
22
Ext Interrupts
20
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
1
Eeprom (bytes)
1024
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
2
Output Compare Channels
5
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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26.4.3
26.5
Table 26-3.
Note:
7799D–AVR–11/10
Symbol
V
V
V
V
t
t
V
CCRR
t
I
RST
BOD
HYST
POR
POT
BG
BG
BG
System and Reset Characteristics
The POR will not work unless the supply voltage has been below VPOT (falling)
External Clock Drive
Power-on Reset Threshold Voltage (rising)
Power-on Reset Threshold Voltage (falling)
V
V
Minimum pulse width on RESET Pin
Brown-out Detector Hysteresis
Min Pulse Width on Brown-out Reset
Bandgap reference voltage
Bandgap reference start-up time
Bandgap reference current consumption
Reset, Brown-out and Internal Voltage Reference Characteristics
CC
CC
Start Voltage to ensure internal Power-on Reset signal
Rise Rate to ensure internal Power_on Reset signal
Table 26-2.
Note:
Symbol
1/t
Δ
t
t
t
t
t
CHCX
CLCH
CHCL
CLCL
CLCX
t
CLCL
CLCL
All DC Characteristics contained in this datasheet are based on simulation and characterization of
other AVR microcontrollers manufactured in the same process technology. These values are pre-
liminary values representing design targets, and will be updated after characterization of actual
silicon.
Parameter
External Clock Drive
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period from
one clock cycle to the
next
(Note:)
Min.
125
50
50
0
V
CC
V
Condition
CC
5V, 25°C
=2.7-5.5V
5.5V
= 2.7V -
ATmega8U2/16U2/32U2
-
-
Max.
1.6
1.6
8
2
Min
-0.1
1.0
0.3
Min.
62.5
25
25
0
V
CC
Typ
400
=4.5-5.5V
1.4
1.3
1.1
50
40
10
Max.
0.5
0.5
16
2
Max
2.3
2.3
0.1
1.2
70
Units
Units
MHz
V/ms
mV
µA
ns
ns
ns
μs
μs
%
ns
ns
µs
V
V
V
V
267
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