ata6286-pnqw ATMEL Corporation, ata6286-pnqw Datasheet - Page 14

• Manufacturer Part Number: ata6286-pnqw
• Description: Ata6285 Tpms Control And Transmitter Ic
• Manufacturer: ATMEL Corporation

4.5.2.2
14
ATA6285/ATA6286 [Preliminary]
ASK Mode
Figure 4-4.
The ATA6285/ATA6286 is activated by ENABLE = High, FSK = High and ASK = Low. After acti-
vation the microcontroller is switched to external clocking. After typically 0.6 ms, the CLK driver
is activated automatically (the microcontroller waits until the XTO and CLK are ready). After
another time period of 250 µs, the PLL is locked and ready to transmit. The output power can
then be modulated by means of pin ASK. After transmission, ASK is switched to Low and the
microcontroller returns back to internal clocking. Then, the ATA6285/ATA6286 is switched to
power-down mode with ENABLE = Low and FSK = Low.
Figure 4-5.
ENABLE
ENABLE
ASK
ASK
FSK
CLK
FSK
CLK
Timing FSK Mode with ENABLE Connected to the Microcontroller
Timing ASK Mode with ENABLE Connected to the Microcontroller
Power-down
Power-down
T
T
XTO
XTO
Power-up,
Power-up,
PA off
PA off
> 250 µs
> 250 µs
(f
Power-up,
RF
Power-up,
PA on
(High)
PA on
= High)
(f
Power-up,
Power-up,
RF
PA off
PA off
(Low)
= Low)
Power-down
Power-down
4958AS–AUTO–09/06