ATA5771-DK1 Atmel, ATA5771-DK1 Datasheet - Page 74

• Manufacturer Part Number: ATA5771-DK1
• Description: BOARD XMITTER FOR ATA5771 868MHZ
• Manufacturer: Atmel
• Type: Transmitterr

Specifications of ATA5771-DK1

• Frequency: 868MHz
• Maximum Frequency: 868 MHz
• Supply Voltage (max): 4 V
• Supply Voltage (min): 2 V
• Supply Current: 8.5 mA
• Product: RF Development Tools
• For Use With/related Products: ATA5771
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.14.4
4.14.4.1
4.14.4.2
74
Atmel ATA5771/73/74
Register Description
MCUCR – MCU Control Register
PORTA – Port A Data Register
Table 4-29.
1.
2.
• Bits 7, 2– Res: Reserved Bits
These bits are reserved bits in the ATtiny44V and will always read as zero.
• Bit 6 – PUD: Pull-up Disable
When this bit is written to one, the pull-ups in the I/O ports are disabled even if the DDxn and
PORTxn Registers are configured to enable the pull-ups ({DDxn, PORTxn} = 0b01). See
tion 4.14.2.1 “Configuring the Pin” on page 62
Bit
Read/Write
Initial Value
Bit
0x1B (0x3B)
Read/Write
Initial Value
Signal
Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
PTOE
DIEOE
DIEOV
DI
AIO
EXT_OSC = crystal oscillator or low frequency crystal oscillator is selected as system clock.
EXT_CLOCK = external clock is selected as system clock.
PB1/XTAL2/PCINT9
EXT_OSC
0
EXT_OSC
0
EXT_OSC
0
0
EXT_OSC
PCINT9 • PCIE1
EXT_OSC
PCINT9 Input
XTAL2
PORTA7
Overriding Signals for Alternate Functions in PB1..PB0
R/W
R
7
–
0
7
0
(1)
(1)
(1)
(1)
(1)
PORTA6
+
• PCINT9 • PCIE1
PUD
R/W
R/W
6
0
6
0
PORTA5
R/W
R/W
SE
5
0
5
0
PORTA4
R/W
4
0
SM1
R/W
4
0
PB0/XTAL1/PCINT8
EXT_CLOCK
0
EXT_CLOCK
0
EXT_CLOCK
0
0
EXT_CLOCK
(PCINT8 • PCIE1)
( EXT_CLOCK
(EXT_CLOCK
CLOCK/PCINT8 Input
XTAL1
for more details about this feature.
PORTA3
R/W
3
0
SM0
R/W
3
0
(2)
(2)
(2
(2)
(2)
PORTA2
(2)
+ EXT_OSC
+ EXT_OSC
+ EXT_OSC
R/W
+ EXT_OSC
• EXT_OSC
2
0
• PWR_DOWN ) +
R
2
–
0
PORTA1
ISC01
R/W
1
0
(1)
R
1
0
(1)
(1)
(1)
(1)
+
• PCINT8 • PCIE1)
PORTA0
ISC00
R/W
R
0
0
0
0
9137E–RKE–12/10
MCUCR
PORTA
Sec-