ATA5773-DK1 Atmel, ATA5773-DK1 Datasheet - Page 58
ATA5773-DK1
Manufacturer Part Number
ATA5773-DK1
Description
BOARD XMITTER FOR ATA5773 315MHZ
Manufacturer
Atmel
Type
Transmitterr
Specifications of ATA5773-DK1
Frequency
315MHz
Maximum Frequency
315 MHz
Supply Voltage (max)
4 V
Supply Voltage (min)
2 V
Supply Current
9 mA
Product
RF Development Tools
For Use With/related Products
ATA5773
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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4.13.2
4.13.2.1
4.13.2.2
58
Atmel ATA5771/73/74
Register Description
MCUCR – MCU Control Register
GIMSK – General Interrupt Mask Register
The External Interrupt Control Register A contains control bits for interrupt sense control.
• Bits 1, 0 – ISC01, ISC00: Interrupt Sense Control 0 Bit 1 and Bit 0
The External Interrupt 0 is activated by the external pin INT0 if the SREG I-flag and the corre-
sponding interrupt mask are set. The level and edges on the external INT0 pin that activate the
interrupt are defined in
edges. If edge or toggle interrupt is selected, pulses that last longer than one clock period will
generate an interrupt. Shorter pulses are not guaranteed to generate an interrupt. If low level
interrupt is selected, the low level must be held until the completion of the currently executing
instruction to generate an interrupt.
Table 4-20.
• Bits 7, 3..0 – Res: Reserved Bits
These bits are reserved bits in the ATtiny44V and will always read as zero.
• Bit 6 – 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.
• Bit 5 – PCIE1: Pin Change Interrupt Enable 1
When the PCIE1 bit is set (one) and the I-bit in the Status Register (SREG) is set (one), pin
change interrupt 1 is enabled. Any change on any enabled PCINT11..8 pin will cause an inter-
rupt. The corresponding interrupt of Pin Change Interrupt Request is executed from the PCI1
Interrupt Vector. PCINT11..8 pins are enabled individually by the PCMSK1 Register.
Bit
0x35 (0x55)
Read/Write
Initial Value
Bit
0x3B (0x5B)
Read/Write
Initial Value
ISC01
0
0
1
1
Interrupt 0 Sense Control
ISC00
R
7
–
0
R
7
–
0
0
1
0
1
Table
PUD
R/W
INT0
R/W
Description
The low level of INT0 generates an interrupt request.
Any logical change on INT0 generates an interrupt request.
The falling edge of INT0 generates an interrupt request.
The rising edge of INT0 generates an interrupt request.
6
0
6
0
4-20. The value on the INT0 pin is sampled before detecting
PCIE1
R/W
R/W
SE
5
0
5
0
PCIE0
SM1
R/W
R/w
4
0
4
0
SM0
R/W
3
0
R
3
–
0
R
2
–
0
R
2
–
0
ISC01
R/W
1
0
R
1
–
0
ISC00
R/W
0
0
0
R
0
–
9137E–RKE–12/10
MCUCR
GIMSK
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