ata5277-pcq ATMEL Corporation, ata5277-pcq Datasheet - Page 8

• Manufacturer Part Number: ata5277-pcq
• Description: Stand-alone Antenna Driver
• Manufacturer: ATMEL Corporation

Command Tables
Table 1. Control Command 0
Note:
Table 2. Control Command 1
Note:
8
CMD0
CMD1
CMD2
CMD3
CMD0
CMD1
CMD2
CMD3
Bit0
Bit1
Bit2
Bit3
Bit0
Bit1
Bit2
Bit3
Bit
Bit
1. Default values after power-on reset
1. See coil current adjustment, default all bits
ATA5277 [Preliminary]
Name/Value
Name/Value
TMOD_SEL
NASK_PSK
C_ON
I_coil0
I_coil1
I_coil2
I_coil3
STBY
X
0
0
0
1
0
0
X
Cmd bit
Cmd bit
Cmd bit
Cmd bit
Cmd bit
Cmd bit
Cmd bit
Cmd bit
Ctrl bit
Ctrl bit
Ctrl bit
Ctrl bit
Ctrl bit
Ctrl bit
Ctrl bit
Ctrl bit
Type
Type
Figure 8 shows a typical sequence for data communication with the ATA5277. Any sta-
tus/command sequence is started with a start bit. The shown sequence requires the
CMD3 bit to be '0', as the protocol ends with the stop bit and after that, modulation mode
is activated. If another command should be transmitted, the CMD3 bit of the preceding
command must be '1' and the new command, which starts again with a start bit, is
applied right after the acknowledge bit of the preceding command.
Usually, the driver output stage is disabled during command mode. But as described
above, by setting the M_Wake bit to '1', the driver stage will be enabled together with the
command mode after wake-up. Note that this is only happening after a wake-up from
standby mode. The driver stage will be disabled when switching back from modulation
mode to command mode, even with the M_Wake bit set to '1'.
If the DIO-line is kept in a passive state (i.e., '1') for more than 32 ms, the IC will fall into
sleep mode.
The following tables contain the description of the eight ATA5277 commands.
Function 1
Command selection
Command selection
Command selection
'
'
'
'
'
Function 1
Command selection
Command selection
Command selection
'
Bit0 of the current control stage
Bit1 of the current control stage
Bit2 of the current control stage
Bit3 of the current control stage
0
0
0
0
0
0
'
'
'
'
'
'
Return to modulation mode
Carrier/driver off
No effect
ASK modulation mode
Modulation timeout 2 ms
Return to modulation mode
'
1
'
(1)
(1)
(1)
(1)
(1)
(1)
(1)
(1)
Function 2
–
–
–
'
'
'
'
'
1
1
1
1
1
'
'
'
'
'
Function 2
–
–
–
'
–
–
–
–
1
Keep command mode
Carrier/driver on
Invokes standby mode
PSK modulation mode
Modulation timeout 500 µs
'
Keep command mode
4669B–RKE–10/03