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ST95HF データシート(PDF) 36 Page - STMicroelectronics

部品番号 ST95HF
部品情報  Dedicated internal frame controller
PDF  93 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST95HF データシート(HTML) 36 Page - STMicroelectronics

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Commands
ST95HF
36/93
DocID025630 Rev 4
Table 25. IDLE command description
Direction
Data
Comments
Example
Host to
ST95HF
07
Command code
Example of switch from Active
mode to Hibernate state:
>>>0x07 0E 08 04 00 04 00
18 00 00 00 00 00 00 00 00
Example of switch from Active to
WFE mode (wake-up by low pulse
on IRQ_IN pin):
>>>0x07 0E 08 01 00 38 00
18 00 00 60 00 00 00 00 00
Example of switch from Active to
WFE mode (wake-up by low pulse
on SPI_SS pin):
>>>0x07 0E 10 01 00 38 00
18 00 00 60 00 00 00 00 00
Example of switch from Active
mode to WFE mode (Sleep / Field
Detector with wake-up by Field
Detection):
>>> 0x07 0E 04 01 42 38 00
18 00 00 60 00 00 00 00
Example of wake-up by Timeout (7
seconds):
Duration before Timeout = 256 * tL
* (WU period + 2) * (MaxSleep + 1)
>>>0x07 0E 01 21 00 38 00
18 00 60 60 00 00 00 00 08
Example of switch from Active to
Tag Detector mode (wake-up by
tag detection or low pulse on
IRQ_IN pin) (32 kHz, inactivity
duration = 272 ms, DAC oscillator
= 3 ms, Swing = 63 pulses of 13.56
MHz):
>>>0x07 0E 0A 21 00 79 01
18 00 20 60 60 64 74 3F 08
Example of a basic Idle command
used during the Tag Detection
Calibration process:
>>>0x07 0E 03 A1 00 F8 01
18 00 20 60 60 00 xx 3F 01
where xx is the DacDataH value.
0E
Length of data
<WU Source>
Specifies authorized wake-
up sources and the LFO
frequency
EnterCtrlL
Settings to enter WFE
mode
EnterCtrlH
WUCtrlL
Settings to wake-up from
WFE mode
WUCtrlH
LeaveCtrlL
Settings to leave WFE
mode (Default value =
0x1800)
LeaveCtrlH
<WUPeriod>
Period of time between two
tag detection bursts. Also
used to specify the duration
before Timeout.
<OscStart>
Defines the Wait time for
HFO to stabilize:
<OscStart> * tL
(Default value = 0x60)
<DacStart>
Defines the Wait time for
DAC to stabilize:
<DacStart> * tL
(Default value = 0x60)
<DacDataL>
Lower compare value for
tag detection (1).
This value must be set to
0x00
during tag detection
calibration.
<DacDataH>
Higher compare value for
tag detection (1).
This is a variable used
during tag detection
calibration.
<SwingsCnt>
Number of swings HF
during tag detection
(Default value = 0x3F)
<MaxSleep>
Max. number of tag
detection trials before
Timeout (1).
This value must be set to
0x01
during tag detection
calibration.
Also used to specify
duration before Timeout.
MaxSleep must be:
0x00 < MaxSleep < 0x1F



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