ATTINY87-15XZ Atmel, ATTINY87-15XZ Datasheet - Page 109

• Manufacturer Part Number: ATTINY87-15XZ
• Description: MCU AVR 8K FLASH 15MZ 20-TSSOP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY87-15XZ

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, LIN, SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 16
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 20-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

11.2
11.2.1
7728G–AVR–06/10
Timer/Counter1 Prescalers Register Description
General Timer/Counter Control Register – GTCCR
• Bit 7 – TSM: Timer/Counter Synchronization Mode
Writing the TSM bit to one activates the Timer/Counter Synchronization mode. In this mode,
the value that is written to the PSR0 and PSR1 bits is kept, hence keeping the corresponding
prescaler reset signals asserted. This ensures that the corresponding Timer/Counters are
halted and can be configured to the same value without the risk of one of them advancing dur-
ing configuration. When the TSM bit is written to zero, the PSR0 and PSR1 bits are cleared by
hardware, and the Timer/Counters start counting simultaneously.
• Bit 0 – PSR1: Prescaler Reset Timer/Counter1
When this bit is one, Timer/Counter1 prescaler will be reset. This bit is normally cleared imme-
diately by hardware, except if the TSM bit is set.
Bit
Read/Write
Initial Value
TSM
R
7
0
R
6
–
0
R
5
–
0
R
4
–
0
R
3
–
0
ATtiny87/ATtiny167
R
2
–
0
PSR0
R/W
1
0
PSR1
R/W
0
0
GTCCR
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