AT90PWM81 Atmel Corporation, AT90PWM81 Datasheet - Page 273

• Manufacturer Part Number: AT90PWM81
• Manufacturer: Atmel Corporation

Specifications of AT90PWM81

• Flash (kbytes): 8 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 20
• Ext Interrupts: 3
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 125
• Analog Comparators: 3
• Resistive Touch Screen: No
• Dac Channels: 1
• Dac Resolution (bits): 10
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 1
• Output Compare Channels: 8
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

22.6
7734P–AVR–08/10
SPI Timing Characteristics
See
Table 22-5.
Note:
Figure 22-3.
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
Figure 22-3
In SPI Programming mode the minimum SCK high/low period is:
- 2 t
- 3 t
(Data Output)
(Data Input)
(CPOL = 0)
(CPOL = 1)
CLCL
CLCL
SS high to tri-state
SCK high/low
SCK to out high
SCK to SS high
SS low to SCK
SCK high/low
Rise/Fall time
Rise/Fall time
SPI Timing Parameters
SPI Interface Timing Requirements (Master Mode)
SS low to out
and
MISO
MOSI
Description
SCK period
Out to SCK
SCK period
for f
for f
SCK to out
SCK to out
SCK
SCK
SS
Setup
Setup
Hold
Hold
Figure 22-4
CK
CK
< 12 MHz
>12 MHz
(1)
6
4
for details.
MSB
5
MSB
Master
Master
Master
Master
Master
Master
Master
Master
Mode
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
Slave
7
4 • t
2 • t
2 • t
Min.
10
t
20
ck
...
ck
ck
ck
...
50% duty cycle
See
0.5 • t
Table 14-5
Typ.
3.6
10
10
10
10
15
15
10
2
sck
AT90PWM81
LSB
1
LSB
2
Max.
1.6
3
8
ns
273