ATtiny167 Atmel Corporation, ATtiny167 Datasheet - Page 32

• Manufacturer Part Number: ATtiny167
• Manufacturer: Atmel Corporation

Specifications of ATtiny167

• Flash (kbytes): 16 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 16
• Ext Interrupts: 16
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Lin: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.5
• 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: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 3
• Input Capture Channels: 1
• Pwm Channels: 9
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

4.3.2
4.3.2.1
4.3.2.2
4.3.2.3
4.3.3
32
ATtiny87/ATtiny167
CLKSELR Register
Enable/Disable Clock Source
Fuses Substitution
Source Selection
Source Recovering
At reset, bits of the Low Fuse Byte are copied into the CLKSELR register. The content of this
register can subsequently be user modified to overwrite the default values from the Low Fuse
Byte. CKSEL[3:0], SUT[1:0] and CKOUT fuses correspond respectively to CSEL[3:0],
CSUT[1:0] and ~(COUT) bits of the CLKSELR register as shown in
The available codes of clock source are given in
Figure 4-5.
The CLKSELR register contains the CSEL, CSUT and COUT values which will be used by the
‘Enable/Disable Clock Source’, ‘Request for Clock Availability’ or ‘Clock Source Switching’
commands.
The ‘Recover System Clock Source’ command updates the CKSEL field of CLKSELR register
(See “System Clock Source Recovering” on page
The ‘Enable Clock Source’ command selects and enables a clock source configured by the
settings in the CLKSELR register. CSEL[3:0] will select the clock source and CSUT[1:0] will
select the start-up time (just as CKSEL and SUT fuse bits do). To be sure that a clock source
is operating, the ‘Request for Clock Availability ’ command must be executed after the ‘Enable
• Command status return. The ‘Request Clock Availability ’ command returns status via the
CLKRDY bit in the CLKCSR register. The ‘Recover System Clock Source ’ command
returns a code of the current clock source in the CLKSELR register. This information is
used in the supervisory software routines as shown in
– ‘Recover System Clock Source’,
– ‘Enable Watchdog in Automatic Reload Mode’.
Fuse Low Byte
SCLKRq
Fuse:
Fuses substitution and Clock Source Selection
(
*
)
: Command of Clock Control & Status Register
SCLKRq
Reset
(
*
)
CLKSELR
Register:
CKSEL[3..0]
SUT[1..0]
Table 4-1 on page
33.).
SEL-0
SEL-1
SEL-2
SEL-n
Section 4.3.7 on page
CKOUT
EN-0
EN-1
EN-2
EN-n
Figure 4-5 on page
25.
Configuration
Configuration
Selected
Current
Switch
Clock
8265B–AVR–09/10
33.
32.