ATTINY25V-15ST Atmel, ATTINY25V-15ST Datasheet - Page 87

• Manufacturer Part Number: ATTINY25V-15ST
• Description: MCU AVR 2K FLASH 4MHZ 8-SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY25V-15ST

• Package / Case: 8-SOIC (3.9mm Width)
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 8MHz
• Number Of I /o: 6
• 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 4x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: USI
• Core Size: 8-Bit
• Processor Series: ATTINY2x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

14.1.5
14.1.6
14.1.7
7598H–AVR–07/09
Timer/Counter1 Output Compare RegisterB - OCR1B
Timer/Counter1 Output Compare RegisterC - OCR1C
Timer/Counter Interrupt Mask Register - TIMSK
The output compare register B is an 8-bit read/write register.
The Timer/Counter Output Compare Register B contains data to be continuously compared with
Timer/Counter1. Actions on compare matches are specified in TCCR1. A compare match does
only occur if Timer/Counter1 counts to the OCR1B value. A software write that sets TCNT1 and
OCR1B to the same value does not generate a compare match.
A compare match will set the compare interrupt flag OCF1B after a synchronization delay follow-
ing the compare event.
The output compare register C is an 8-bit read/write register.
The Timer/Counter Output Compare Register C contains data to be continuously compared with
Timer/Counter1. A compare match does only occur if Timer/Counter1 counts to the OCR1C
value. A software write that sets TCNT1 and OCR1C to the same value does not generate a
compare match. If the CTC1 bit in TCCR1 is set, a compare match will clear TCNT1.
This register has the same function in normal mode and PWM mode.
• Bit 7 - Res: Reserved Bit
This bit is a reserved bit in the ATtiny25/45/85 and always reads as zero.
• Bit 6 - OCIE1A: Timer/Counter1 Output Compare Interrupt Enable
When the OCIE1A bit is set (one) and the I-bit in the Status Register is set (one), the
Timer/Counter1 Compare MatchA, interrupt is enabled. The corresponding interrupt at vector
$003 is executed if a compare matchA occurs. The Compare Flag in Timer/Counter1 is set (one)
in the Timer/Counter Interrupt Flag Register.
• Bit 5 - OCIE1B: Timer/Counter1 Output Compare Interrupt Enable
When the OCIE1B bit is set (one) and the I-bit in the Status Register is set (one), the
Timer/Counter1 Compare MatchB, interrupt is enabled. The corresponding interrupt at vector
$009 is executed if a compare matchB occurs. The Compare Flag in Timer/Counter1 is set (one)
in the Timer/Counter Interrupt Flag Register.
Bit
$2D ($4D)
Read/Write
Initial value
Bit
$2B ($4B)
Read/Write
Initial value
Bit
$39 ($59)
Read/Write
Initial value
MSB
MSB
R/W
R/W
R
7
0
7
0
-
7
1
OCIE1A
R/W
R/W
R/W
6
0
6
1
6
0
OCIE1B
R/W
R/W
5
0
5
1
R/W
5
0
R/W
R/W
OCIE0A
4
0
4
1
R/W
4
0
R/W
R/W
3
0
3
1
OCIE0B
R/W
3
0
R/W
R/W
2
0
2
1
TOIE1
R/W
2
0
ATtiny25/45/85
R/W
R/W
1
0
1
1
TOIE0
R/W
1
0
LSB
R/W
LSB
R/W
0
0
0
1
R
0
0
-
OCR1B
OCR1C
TIMSK
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