ATTINY4313-MU Atmel, ATTINY4313-MU Datasheet - Page 27

• Manufacturer Part Number: ATTINY4313-MU
• Description: IC MCU AVR 4K FLASH 20QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY4313-MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-VQFN Exposed Pad, 20-HVQFN, 20-SQFN, 20-DHVQFN
• Processor Series: ATtiny
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI, USART, USI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 18
• Number Of Timers: 2
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details

6.2.4
8246A–AVR–11/09
128 kHz Internal Oscillator
Reset Time-out. For more information on the pre-programmed calibration value, see the section
“Calibration Byte” on page
Table 6-3.
Note:
When this Oscillator is selected, start-up times are determined by the SUT Fuses as shown in
Table
Table 6-4.
Notes:
The 128 kHz Internal Oscillator is a low power Oscillator providing a clock of 128 kHz. The fre-
quency is nominal at 3 V and 25°C. This clock may be selected as the system clock by
programming the CKSEL Fuses to 0110.
When this clock source is selected, start-up times are determined by the SUT Fuses as shown in
Table
Table 6-5.
Note:
SUT1..0
SUT1..0
10
00
01
00
01
10
11
11
(2)
6-4.
6-5.
1. The device is shipped with this option selected.
1. If the RSTDISBL fuse is programmed, this start-up time will be increased to 14CK + 4 ms to
2. The device is shipped with this option selected.
1. If the RSTDISBL fuse is programmed, this start-up time will be increased to 14CK + 4 ms to
ensure programming mode can be entered.
ensure programming mode can be entered.
CKSEL3..0
Start-up Time from Power-
Start-up Time from Power-
down and Power-save
down and Power-save
0010
0100
Internal Calibrated RC Oscillator Operating Modes
Start-up Times for the Internal Calibrated RC Oscillator Clock Selection
Start-up Times for the 128 kHz Internal Oscillator
6 CK
6 CK
6 CK
6 CK
6 CK
6 CK
181.
Additional Delay from
Additional Delay from
Reserved
Reserved
14CK + 64 ms
14CK + 64 ms
14CK + 4 ms
14CK + 4 ms
14CK
14CK
Reset
Reset
Nominal Frequency
(1)
(1)
8.0 MHz
4.0 MHz
(1)
Recommended Usage
BOD enabled
Fast rising power
Slowly rising power
Recommended Usage
BOD enabled
Fast rising power
Slowly rising power
27