ATTINY4-TS8R Atmel, ATTINY4-TS8R Datasheet - Page 20

• Manufacturer Part Number: ATTINY4-TS8R
• Description: IC MCU AVR 512B FLASH SOT-23-6
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY4-TS8R

• Package / Case: SOT-23-6
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 12MHz
• Number Of I /o: 4
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 32 x 8
• Program Memory Size: 512B (512 x 8)
• Oscillator Type: Internal
• Peripherals: POR, PWM, WDT
• Core Size: 8-Bit
• Processor Series: ATTINY4x
• Core: AVR8
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Lead Free Status / Rohs Status: Details

6.4
6.4.1
6.4.2
6.4.3
20
Starting
ATtiny4/5/9/10
Starting from Reset
Starting from Power-Down Mode
Starting from Idle / ADC Noise Reduction / Standby Mode
The internal reset is immediately asserted when a reset source goes active. The internal reset is
kept asserted until the reset source is released and the start-up sequence is completed. The
start-up sequence includes three steps, as follows.
Table 6-1.
Notes:
When waking up from Power-Down sleep mode, the supply voltage is assumed to be at a suffi-
cient level and only the oscillator start-up time is counted to ensure the stable operation of the
oscillator. The oscillator start-up time is counted on the selected main clock, and the start-up
time depends on the clock selected. See
Table 6-2.
Notes:
When waking up from Idle, ADC Noise Reduction or Standby Mode, the oscillator is already run-
ning and no oscillator start-up time is introduced.
The ADC is available in ATtiny5/10, only.
1. The first step after the reset source has been released consists of the device counting
2. The second step is to count the oscillator start-up time, which ensures that the cali-
3. The last step before releasing the internal reset is to load the calibration and the config-
Reset
64 ms
the reset start-up time. The purpose of this reset start-up time is to ensure that supply
voltage has reached sufficient levels. The reset start-up time is counted using the inter-
nal 128 kHz oscillator. See
Note that the actual supply voltage is not monitored by the start-up logic. The device
will count until the reset start-up time has elapsed even if the device has reached suffi-
cient supply voltage levels earlier.
brated internal oscillator has reached a stable state before it is used by the other parts
of the system. The calibrated internal oscillator needs to oscillate for a minimum num-
ber of cycles before it can be considered stable. See
oscillator start-up time.
uration values from the Non-Volatile Memory to configure the device properly. The
configuration time is listed in
1. After powering up the device or after a reset the system clock is automatically set to calibrated
1. The start-up time is measured in main clock oscillator cycles.
Oscillator start-up time
internal 8 MHz oscillator, divided by 8
Oscillator
6 cycles
Start-up Times when Using the Internal Calibrated Oscillator
Start-up Time from Power-Down Sleep Mode.
6 cycles
Configuration
21 cycles
Table 6-1
Table
6-1.
Table 6-2
Total start-up time
for details of reset start-up time.
64 ms + 6 oscillator cycles + 21 system clock cycles
for details.
Table 6-1
6 oscillator cycles
Total start-up time
for details of the
(1)
8127D–AVR–02/10
(1)