ATmega16A Atmel Corporation, ATmega16A Datasheet - Page 298

• Manufacturer Part Number: ATmega16A
• 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

Table 27-4.
Notes:
27.8
298
Symbol
t
t
t
t
HD;DAT
SU;DAT
SU;STO
BUF
1. In ATmega16A, this parameter is characterized and not 100% tested.
2. Required only for f
3. C
4. f
5. This requirement applies to all ATmega16A Two-wire Serial Interface operation. Other devices connected to the Two-wire
6. The actual low period generated by the ATmega16A Two-wire Serial Interface is (1/f
7. The actual low period generated by the ATmega16A Two-wire Serial Interface is (1/f
SPI Timing Characteristics
ATmega16A
Serial Bus need only obey the general f
6 MHz for the low time requirement to be strictly met at f
ment will not be strictly met for f
communicate at full speed (400 kHz) with other ATmega16A devices, as well as any other device with a proper t
tance margin.
Parameter
Data hold time
Data setup time
Setup time for STOP condition
Bus free time between a STOP and START
condition
CK
b
= capacitance of one bus line in pF.
= CPU clock frequency
Two-wire Serial Bus Requirements (Continued)
Figure 27-4. Two-wire Serial Bus Timing
Figure 27-5. SPI Serial Programming Waveforms
SCL
> 100 kHz.
SCL
SDA
SERIAL DATA OUTPUT
SERIAL CLOCK INPUT
SERIAL DATA INPUT
t
SU;STA
SCL
SAMPLE
> 308 kHz when f
(MOSI)
(MISO)
(SCK)
SCL
requirement.
t
HD;STA
t
of
t
LOW
MSB
MSB
CK
f
f
f
f
f
f
f
f
= 8 MHz. Still, ATmega16A devices connected to the bus may
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
Condition
t
= 100 kHz.
≤ 100 kHz
> 100 kHz
≤ 100 kHz
> 100 kHz
≤ 100 kHz
> 100 kHz
≤ 100 kHz
> 100 kHz
HIGH
t
HD;DAT
t
LOW
t
SU;DAT
SCL
SCL
- 2/f
Min
250
100
4.0
0.6
4.7
1.3
- 2/f
0
0
CK
CK
), thus f
), thus the low time require-
CK
t
SU;STO
must be greater than
t
Max
3.45
r
0.9
–
–
–
–
–
–
LSB
LSB
8154B–AVR–07/09
LOW
t
BUF
accep-
Units
µs
µs
ns
ns
µs
µs
µs
µs