ATTINY25-20SH Atmel, ATTINY25-20SH Datasheet - Page 99

• Manufacturer Part Number: ATTINY25-20SH
• Description: IC MCU AVR 2KB FLASH 20MHZ 8SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY25-20SH

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 6
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
• Processor Series: ATtiny
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: SPI, USI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 6
• Number Of Timers: 2
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2586M–AVR–07/10
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this unit useful for lower speed functions or exact timing functions with infrequent actions.
Figure 13-2. Timer/Counter 1 Synchronization Register Block Diagram.
Timer/Counter1 and the prescaler allow running the CPU from any clock source while the pres-
caler is operating on the fast 25.6 MHz PCK clock in the asynchronous mode.
The following
PCKE
CK
PCK
SYNC
MODE
ASYNC
MODE
for a detailed description on this function. Similarly, the high prescaling opportunities make
IO-registers
OCR1C
OCF1A
OCR1A
TCCR1
GTCCR
TCNT1
TOV1
Figure 13-3
1..2 PCK Delay
1..2 PCK Delay
shows the block diagram for Timer/Counter1.
S
A
Input synchronization
registers
OCR1A_SI
OCR1C_SI
TCCR1_SI
GTCCR_SI
TCNT1_SI
OCF1A_SI
TOV1_SI
1 PCK Delay
1PCK Delay
S
A
8-BIT DATABUS
Timer/Counter1
TCNT1
~1 CK Delay
~1 CK Delay
Output synchronization
registers
TCNT_SO
OCF1A_SO
TOV1_SO
No Delay
No Delay
TCNT1
OCF1A
TOV1
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