ATA5423_06 ATMEL [ATMEL Corporation], ATA5423_06 Datasheet - Page 50
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ATA5423_06
Manufacturer Part Number
ATA5423_06
Description
UHF ASK/FSK Transceiver
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATA5423_06.pdf
(100 pages)
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8.4
Figure 8-4.
8.5
8.6
8.7
50
Command: Write Control Register
Command: OFF Command
Command: Delete IRQ
Command Structure
ATA5423/25/28/29
SDI_TMDI
SDO_TMDO
SCK
CS
Write Control Register
Command: Write Control Register X
MSB
No. Bytes in the TX/RX Data Buffer
The control registers can be written individually or successively. An echo of the command and
the data bytes are provided for the microcontroller on pin SDO_TMDO.
If AVCC_EN in control register 1 is “0”, the input level on pin PWR_ON is low and on the key
inputs Tn is high, then the OFF command sets the transceiver in the OFF mode.
Figure 8-5.
The delete IRQ command sets pin IRQ to low.
Figure 8-6.
The three most significant bits of the command (bit 5 to bit 7) indicate the command type. Bit 0 to
bit 4 describe the target address when reading or writing a control or status register. In all other
commands bit 0 to bit 4 have no effect and should be set to “0” for compatibility with future
products.
OFF Command
Delete IRQ
LSB
MSB
Write Control Register X
Data Control Register X
SDI_TMDI
SDO_TMDO
SCK
CS
SDI_TMDI
SDO_TMDO
SCK
CS
LSB
MSB
MSB
No. Bytes in the TX/RX Data Buffer
No. Bytes in the TX/RX Data Buffer
Command: OFF Command
Command: Delete IRQ
Command: Write Control Register Y
MSB
Data Control Register X
LSB
LSB
LSB
4841C–WIRE–05/06
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