ATmega32 Atmel Corporation, ATmega32 Datasheet - Page 291

• 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

SPI Timing
Characteristics
2503Q–AVR–02/11
Figure 145. Two-wire Serial Bus Timing
See
Table 120. SPI Timing Parameters
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
Figure 146
SCL
SDA
5. This requirement applies to all ATmega32 Two-wire Serial Interface operation. Other devices
SS high to tri-state
t
SU;STA
SCK to out high
connected to the Two-wire Serial Bus need only obey the general f
SCK to SS high
SS low to SCK
SCK high/low
Rise/Fall time
SCK high/low
Rise/Fall time
SS low to out
Description
SCK period
Out to SCK
SCK period
SCK to out
SCK to out
Setup
Setup
and
Hold
Hold
Figure 147
t
HD;STA
t
t
of
LOW
for details.
Master
Master
Master
Master
Master
Master
Master
Master
Mode
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Salve
Slave
t
HIGH
t
HD;DAT
4 • t
2 • t
2 • t
Min
10
20
t
ck
ck
ck
ck
t
LOW
t
50% duty cycle
SU;DAT
See
0.5 • t
Table 58
Typ
3.6
10
10
10
10
15
15
10
SCK
ATmega32(L)
SCL
Max
1.6
requirement.
t
SU;STO
t
r
ns
µs
ns
t
BUF
291