ATTINY84V-10PU Atmel, ATTINY84V-10PU Datasheet - Page 30

• Manufacturer Part Number: ATTINY84V-10PU
• Description: AVR MCU, 8K FLASH, 512B RAM, 512B EE
• Manufacturer: Atmel

Specifications of ATTINY84V-10PU

• Controller Family/series: AVR Tiny
• No. Of I/o's: 12
• Eeprom Memory Size: 512Byte
• Ram Memory Size: 1KB
• Cpu Speed: 10MHz
• Core Size: 8bit
• Program Memory Size: 8KB
• Oscillator Type: External, Internal
• Processor Series: ATTINY8x
• Core: AVR8
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Data Ram Size: 512 B
• Interface Type: SPI
• Maximum Clock Frequency: 10 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Package / Case: PDIP-14
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.6
7.7
30
Calibrated Internal RC Oscillator
External Clock
ATtiny24/44/84
By default, the Internal RC Oscillator provides an approximate 8 MHz clock. Though voltage and
temperature dependent, this clock can be very accurately calibrated by the the user. See
22-1 on page 181
shipped with the CKDIV8 Fuse programmed. See
more details.
This clock may be selected as the system clock by programming the CKSEL Fuses as shown in
Table
the pre-programmed calibration value into the OSCCAL Register and thereby automatically cal-
ibrates the RC Oscillator. The accuracy of this calibration is shown as Factory calibration in
Table 22-1 on page
By changing the OSCCAL register from SW, see
page
The accuracy of this calibration is shown as User calibration in
When this Oscillator is used as the chip clock, the Watchdog Oscillator will still be used for the
Watchdog Timer and for the Reset Time-out. For more information on the pre-programmed cali-
bration value, see the section
Table 7-6.
Note:
When this Oscillator is selected, start-up times are determined by the SUT Fuses as shown in
Table 7-7 on page
Table 7-7.
Note:
To drive the device from an external clock source, CLKI should be driven as shown in
on page
“0000”.
SUT1..0
10
00
01
11
33, it is possible to get a higher calibration accuracy than by using the factory calibration.
(1)
7-6. If selected, it will operate with no external components. During reset, hardware loads
1. The device is shipped with this option selected.
1. The device is shipped with this option selected.
31. To run the device on an external clock, the CKSEL Fuses must be programmed to
CKSEL3..0
Internal Calibrated RC Oscillator Operating Modes
Start-up Times for the Internal Calibrated RC Oscillator Clock Selection
0010
from Power-down
and
30..
(1)
181.
Start-up Time
”Internal Oscillator Speed” on page 205
6 CK
6 CK
6 CK
”Calibration Byte” on page
Additional Delay from
Reset (V
Reserved
”Oscillator Calibration Register – OSCCAL” on
14CK + 64 ms
14CK + 4 ms
”System Clock Prescaler” on page 32
14CK
CC
Nominal Frequency
166.
= 5.0V)
8.0 MHz
Table 22-1 on page
for more details. The device is
Recommended Usage
BOD enabled
Fast rising power
Slowly rising power
8006F–AVR–02/07
181.
Figure 7-3
Table
for