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ATtiny48 Datasheet(PDF) 54 Page - ATMEL Corporation |
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ATtiny48 Datasheet(HTML) 54 Page - ATMEL Corporation |
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54 / 266 page  54 8008C–AVR–03/09 ATtiny48/88 9.3.6 PCMSK3 – Pin Change Mask Register 3 • Bit 7..4 – Res: Reserved Bits These bits are reserved and will always read zero. • Bit 3..0 – PCINT27..24: Pin Change Enable Mask 27..24 Each PCINT27..24-bit selects whether pin change interrupt is enabled on the corresponding I/O pin. If PCINT27..24 is set and the PCIE3 bit in PCICR is set, pin change interrupt is enabled on the corresponding I/O pin. If PCINT27..24 is cleared, pin change interrupt on the corresponding I/O pin is disabled. 9.3.7 PCMSK2 – Pin Change Mask Register 2 • Bit 7..0 – PCINT23..16: Pin Change Enable Mask 23..16 Each PCINT23..16-bit selects whether pin change interrupt is enabled on the corresponding I/O pin. If PCINT23..16 is set and the PCIE2 bit in PCICR is set, pin change interrupt is enabled on the corresponding I/O pin. If PCINT23..16 is cleared, pin change interrupt on the corresponding I/O pin is disabled. 9.3.8 PCMSK1 – Pin Change Mask Register 1 • Bit 7..0 – PCINT15..8: Pin Change Enable Mask 15..8 Each PCINT15..8-bit selects whether pin change interrupt is enabled on the corresponding I/O pin. If PCINT15..8 is set and the PCIE1 bit in PCICR is set, pin change interrupt is enabled on the corresponding I/O pin. If PCINT15..8 is cleared, pin change interrupt on the corresponding I/O pin is disabled. 9.3.9 PCMSK0 – Pin Change Mask Register 0 • Bit 7..0 – PCINT7..0: Pin Change Enable Mask 7..0 Each PCINT7..0 bit selects whether pin change interrupt is enabled on the corresponding I/O pin. If PCINT7..0 is set and the PCIE0 bit in PCICR is set, pin change interrupt is enabled on the corresponding I/O pin. If PCINT7..0 is cleared, pin change interrupt on the corresponding I/O pin is disabled. Bit 7 65 43 2 1 0 - - - - PCINT27 PCINT26 PCINT25 PCINT24 PCMSK3 Read/Write R R R R R/W R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 Bit 7 65 43 2 1 0 PCINT23 PCINT22 PCINT21 PCINT20 PCINT19 PCINT18 PCINT17 PCINT16 PCMSK2 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 Bit 7 65 43 2 1 0 PCINT15 PCINT14 PCINT13 PCINT12 PCINT11 PCINT10 PCINT9 PCINT8 PCMSK1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 Bit 7 65 43 21 0 PCINT7 PCINT6 PCINT5 PCINT4 PCINT3 PCINT2 PCINT1 PCINT0 PCMSK0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 |
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