ATmega32 Atmel Corporation, ATmega32 Datasheet - Page 289

• Manufacturer Part Number: ATmega32
• Manufacturer: Atmel Corporation

Specifications of ATmega32

• Flash (kbytes): 32 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): 2
• 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: 3
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

External Clock
Drive Waveforms
External Clock
Drive
2503Q–AVR–02/11
5. Minimum V
5] The sum of all IOH, for ports D3 - D7, should not exceed 100mA.
6] The sum of all IOH, for ports C0 - C7, should not exceed 100mA.If IOH exceeds the test condition, VOH may exceed the
related specification. Pins are not guaranteed to source current greater than the listed test condition.
CC
for Power-down is 2.5V.
Figure 144. External Clock Drive Waveforms
Table 117. External Clock Drive
Table 118. External RC Oscillator, Typical Frequencies (V
Notes:
Symbol
1/t
t
t
t
t
t
Δ
CLCL
CHCX
CLCX
CLCH
CHCL
t
CLCL
CLCL
1. R should be in the range 3kΩ - 100kΩ, and C should be at least 20pF. The C values given in
2. The frequency will vary with package type and board layout.
the table includes pin capacitance. This will vary with package type.
R [kΩ]
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period from
one clock cycle to the
next
V
33
10
IL1
V
(1)
IH1
V
CC
Min
125
50
50
0
= 2.7V to
C [pF]
22
22
Max
1.6
1.6
5.5
8
2
V
CC
V
62.5
Min
CC
25
25
0
= 5V)
= 4.5V to
ATmega32(L)
Max
0.5
0.5
650kHz
2.0MHz
16
5.5
2
f
(2)
V
Units
MHz
μs
ns
%
289