ATA5830N-PNQW Atmel, ATA5830N-PNQW Datasheet - Page 7

• Manufacturer Part Number: ATA5830N-PNQW
• Manufacturer: Atmel

Specifications of ATA5830N-PNQW

• Lead Free Status / Rohs Status: Supplier Unconfirmed

1.5
Figure 1-1.
9208DS–RKE–07/11
Typical Application Circuits
Typical 3V Application with External Microcontroller
Figure 1-1
or 433.92MHz running from a 3V lithium cell. The Atmel
NSS(PB5) and NPWRON1(PC1) are used to wake it. In OFFMode the Atmel ATA5830 draws
typically less than 5nA (600nA maximum at 3.6V/85°C).
In OFFMode all Atmel
PC0..PC5 and PB7 have internal pull-up resistors ensuring that the voltage at these ports is
VS. PB0..PB6 are tristate inputs and require additional consideration. PB1,PB2 and PB5 have
defined voltages since they are connected to the output of the external microcontroller. PB4 is
connected to ground to avoid unwanted power ups. PB0, PB3 and PB6 do not require external
circuitry since the internal circuit avoids transverse currents in the OffMode. The external
microcontroller has to tolerate the floating inputs. Otherwise additional pull down resistors are
required on these floating lines.
Typically, the key fob buttons are connected to the external microcontroller and the Atmel
ATA5830 wake-up is done by pulling NSS (pin 27) and NPWRON1 (pin 15) to ground. If there
are not enough ports for button inputs on the microcontroller, it is possible to connect up to
four additional buttons to the Ports PC2..PC5. In this case, the occurrence of a port event (but-
ton pressed) will generate an interrupt (pin 28). The port event that triggered the interrupt is
available in the event register.
1
2
3
4
5
6
7
8
shows a key fob application circuit with an external host microcontroller for 315MHz
RFIN_LB
RFIN_HB
SPDT_RX
SPDT_ANT
ANT_TUNE
SPDT_TX
RF_OUT
VS_PA
ATEST
32
_IO1
TEST
_EN
9
31
10
ATEST
_IO2
30
11
®
ATA5830
ATA5830 AVR
12
29
Atmel
13
28
27
14
15
26
VS = 3V
®
25
16
Ports PB0..PB7 and PC0..PC5 are switched to Input.
DGND
DVCC
Atmel ATA5830/ATA5830N
PB2
PB1
PB0
PC5
PC4
PC3
24
23
22
21
20
19
18
17
®
ATA5830 stays in OFFMode until
IRQ
NSS
MISO
MOSI
SCK
CLK_IN
VDD
Microcontroller
7