ATA5278-PKQI Atmel, ATA5278-PKQI Datasheet - Page 6

• Manufacturer Part Number: ATA5278-PKQI
• Description: IC ANTENNA DVR STAND-ALONE 28QFN
• Manufacturer: Atmel
• Type: Stand Alone Antenna Driverr

Specifications of ATA5278-PKQI

• Rf Type: TPM
• Frequency: 125kHz
• Package / Case: 28-VFQFN
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: ATA5278-PKQITR

3.4
6
Oscillator
ATA5278
In case the microcontroller is not able to communicate properly with the ATA5278 or any other
disturbance has occurred, it can trigger a reset (like a power-on-reset, POR) in the chip by pull-
ing the NRES pin to ground, which will bring the logic back to the startup state, i.e., all
configurations are at default and the IC is in power-down mode.
Figure 3-3.
The ATA5278 is equipped with an internal oscillator circuitry that provides the system clock sig-
nal needed for operation. It is intended to work with an externally applied passive reference
device such as a ceramic resonator or a crystal. Active clock sources like microcontrollers or
crystal oscillators, however, can also be used.
oscillator circuitry.
Figure 3-4.
Int. state
C
NRES
S_CS
OSC
in
External Reset
Internal Oscillator Circuitry
= 12 pF typ.
Pull-down
OSCI
f = 8 MHz
X
X
R
fb
= 250 k typ.
t
POR
NRES
S1
Figure 3-4
OSCO
C
R
out
d
shows the internal structure of the
= 420
Power-down
= 12 pF typ.
Clock signal
judging
Enable signal
from SPI
To internal
logic
4832D–RKE–12/07