PCIF0 datasheet(67/294 Pages) ATMEL

67 / 294 page

9219A–RFID–01/11

Atmel ATA5505 [Preliminary]

• Bit 1 – INT1: External Interrupt Request 1 Enable

When the INT1 bit is set (one) and the I-bit in the Status Register (SREG) is set (one), the

external pin interrupt is enabled. The Interrupt Sense Control1 bits 1/0 (ISC11 and ISC10) in

the External Interrupt Control Register A (EICRA) define whether the external interrupt is acti-

vated on rising and/or falling edge of the INT1 pin or level sensed. Activity on the pin will cause

an interrupt request even if INT1 is configured as an output. The corresponding interrupt of

External Interrupt Request 1 is executed from the INT1 Interrupt Vector.

• Bit 0 – INT0: External Interrupt Request 0 Enable

When the INT0 bit is set (one) and the I-bit in the Status Register (SREG) is set (one), the

external pin interrupt is enabled. The Interrupt Sense Control0 bits 1/0 (ISC01 and ISC00) in

the External Interrupt Control Register A (EICRA) define whether the external interrupt is acti-

vated on rising and/or falling edge of the INT0 pin or level sensed. Activity on the pin will cause

an interrupt request even if INT0 is configured as an output. The corresponding interrupt of

External Interrupt Request 0 is executed from the INT0 Interrupt Vector.

8.3.3

External Interrupt Flag Register – EIFR

• Bit 7, 2 – Res: Reserved Bits

These bits are unused bits in the Atmel® AVR®, and will always read as zero.

• Bit 1 – INTF1: External Interrupt Flag 1

When an edge or logic change on the INT1 pin triggers an interrupt request, INTF1 becomes

set (one). If the I-bit in SREG and the INT1 bit in EIMSK are set (one), the MCU will jump to

the corresponding Interrupt Vector. The flag is cleared when the interrupt routine is executed.

Alternatively, the flag can be cleared by writing a logical one to it. This flag is always cleared

when INT1 is configured as a level interrupt.

• Bit 0 – INTF0: External Interrupt Flag 0

When an edge or logic change on the INT0 pin triggers an interrupt request, INTF0 becomes

set (one). If the I-bit in SREG and the INT0 bit in EIMSK are set (one), the MCU will jump to

the corresponding Interrupt Vector. The flag is cleared when the interrupt routine is executed.

Alternatively, the flag can be cleared by writing a logical one to it. This flag is always cleared

when INT0 is configured as a level interrupt.

8.3.4

Pin Change Interrupt Control Register – PCICR

• Bit 7, 2 – Res: Reserved Bits

These bits are unused bits in the Atmel AVR, and will always read as zero.

Bit

76543210

––––––

INTF1

INTF0

EIFR

Read/Write

RRRRRR

R/W

Initial Value

00000000

Bit

76543210

––––––

PCIE1

PCIE0

PCICR

Read/Write

RRRRRR

R/W

Initial Value

00000000

PCIF0 Scheda tecnica(PDF) 67 Page - ATMEL Corporation

PCIF0 Scheda tecnica(HTML) 67 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Scheda tecnica Scarica

Link URL