ATA5276M-PGQW 19 Atmel, ATA5276M-PGQW 19 Datasheet - Page 4

• Manufacturer Part Number: ATA5276M-PGQW 19
• Manufacturer: Atmel

Specifications of ATA5276M-PGQW 19

• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 20
• Lead Free Status / RoHS Status: Compliant

4. Functional Description
4.1
4.2
4
Operation Modes
Standby Mode and Wake-up
ATA5276
There are two different operation modes for the ATA5276:
After power-on-reset, the ATA5276 is in standby mode. For minimum power consumption, only
the internal 5V supply and the DIO line interface are active. The IC can be activated by the exter-
nal control unit via the serial interface. The DIO line is called logic high if it is pulled up to the
VDIO voltage level. The DIO line is called logic low if it is pulled down to the VSS voltage level. A
low signal at the DIO line wakes-up the IC.
The circuit enters the standby mode if either of these three conditions are fulfilled:
Notes:
Figure 4-1.
Figure 4-2.
• Standby mode
• Transmission mode
1. After power-on-reset and the DIO is high (see
2. After a time out of T
3. After a time out of T
page
time T
1. Time does not depend on the antenna resonance frequency.
2. Time depends on the antenna resonance frequency.
5)
ACK
STBY After POR
STBY After DIO = H
/T
ERR
(1)
(see
OUTL
OUTH
Figure
(1)
(2)
during which DIO is permanently low (see
during which DIO is permanently high and an acknowledge
4-2)
POR
STBY
DIO
STBY
DIO
TOUT_H
Figure
TACK/TERR
t
t
t
t
t
4-1)
Figure 4-3 on
4909C–AUTO–01/07