ATAB5423-3-WB Atmel, ATAB5423-3-WB Datasheet - Page 46

• Manufacturer Part Number: ATAB5423-3-WB
• Description: KIT DEMO 315MHZ BLACKBIRD
• Manufacturer: Atmel
• Type: Transceiver, UHFr

Specifications of ATAB5423-3-WB

• Frequency: 315MHz
• Product: RF Modules
• For Use With/related Products: ATA5423
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ATAB-5423-3-WB

7.6
Figure 7-4.
46
Pin PWR_ON
ATA5423/ATA5425/ATA5428/ATA5429
(Status register)
DVCC, AVCC
Timing Pin PWR_ON, Status Bit Power_On
Power_ON
N_RESET
PWR_ON
VSOUT
CLK
IRQ
To switch the transceiver from OFF to IDLE mode, pin PWR_ON must be set to “1” (minimum
0.8
sets pin N_RESET to low, and switches on DVCC, AVCC and the power supply for external
devices VSOUT.
If V
sets the status bit Power_On to “1” and an interrupt is issued (T
After the voltage on pin VSOUT exceeds 2.3V (typically) and the start-up time of the XTO is
elapsed the output clock on pin CLK is available. Because the enabling of pin CLK is asynchro-
nous, the first clock cycle may be incomplete. N_RESET is set to high if V
(typically) and the XTO is settled.
If the transceiver is in any active mode (IDLE, AUX, RX, RX_Polling, TX), a positive edge on pin
PWR_ON sets Power_On to “1” (after T
erates an interrupt. If Power_On is still “1” during the positive edge on pin PWR_ON no interrupt
is issued. Power_On and the interrupt are deleted after reading the status register.
During Power_On = 1, the bits VSOUT_EN and CLK_ON in control register 3 are set to “1”.
Note:
1.5V (typ)
Mode
OFF
V
DVCC
Thres_2
V
VS2
It is not possible to set the transceiver to OFF mode by setting pin PWR_ON to “0”. If pin
PWR_ON is not used, it must be connected to GND.
exceeds 1.5V (typically) and the XTO is settled, the digital control logic is active and
= 2.38V (typ)
) for at least T
T
T
PWR_ON
PWR_ON_IRQ_1
Mode
IDLE
> T
PWR_ON_IRQ_1
V
Thres_1
PWR_ON
(typ)
= 2.V
(see
Figure
PWR_ON_IRQ_2
T
PWR_ON
IDLE, AUX, RX, RX Polling, TX
7-4). The transceiver recognizes the positive edge,
> T
T
PWR_ON_IRQ_2
PWR_ON_IRQ_2
). The state transition Power_On 0
Mode
PWR_ON_IRQ_1
VSOUT
).
exceeds 2.38V
4841D–WIRE–10/07
1 gen-