ATTINY24-15SSZ Atmel, ATTINY24-15SSZ Datasheet - Page 29

• Manufacturer Part Number: ATTINY24-15SSZ
• Description: MCU AVR 2K FLASH 15MHZ 14-SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY24-15SSZ

• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 12
• Eeprom Size: 128 x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Program Memory Size: 2KB (2K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: USI
• Core Size: 8-Bit
• Cpu Family: ATtiny
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 16MHz
• Interface Type: SPI/UART
• Total Internal Ram Size: 128Byte
• # I/os (max): 12
• Number Of Timers - General Purpose: 2
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 14
• Package Type: SOIC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.6
7.7
7701D–AVR–09/10
Calibrated Internal RC Oscillator
External Clock
By default, the Internal RC Oscillator provides an approximate 8MHz clock. Though voltage
and temperature dependent, this clock can be very accurately calibrated by the user. See
Table 22-2 on page 179
device is shipped with the CKDIV8 Fuse programmed. See
31
This clock may be selected as the system clock by programming the CKSEL Fuses as shown
in
loads the pre-programmed calibration value into the OSCCAL Register and thereby automati-
cally calibrates the RC Oscillator. The accuracy of this calibration is shown as Factory
calibration in
By changing the OSCCAL register from SW, see
on page
tion. 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
calibration 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
7-3 on page
grammed to “0000”.
SUT1..0
Table
for more details.
10
00
01
11
(1)
1. The device is shipped with this option selected.
1. The device is shipped with this option selected.
7-6. If selected, it will operate with no external components. During reset, hardware
32, it is possible to get higher calibration accuracy than by using the factory calibra-
Table 22-2 on page
CKSEL3..0
30. To run the device on an external clock, the CKSEL Fuses must be pro-
Internal Calibrated RC Oscillator Operating Modes
Start-up Times for the Internal Calibrated RC Oscillator Clock Selection
0010
from Power-down
29..
(1)
Start-up Time
6 CK
6 CK
6 CK
and
Atmel ATtiny24/44/84 [Preliminary]
“Internal Oscillator Speed” on page 203
“Calibration Byte” on page
179.
Additional Delay from
Reset (V
Reserved
14CK + 64 ms
14CK + 4 ms
“Oscillator Calibration Register – OSCCAL”
14CK
CC
Nominal Frequency
= 5.0V)
“System Clock Prescaler” on page
164.
8.0 MHz
Table 22-2 on page
Recommended Usage
BOD enabled
Fast rising power
Slowly rising power
for more details. The
Figure
179.
29