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PCF7936AS3851 数据表(PDF) 21 Page - NXP Semiconductors

部件名 PCF7936AS3851
功能描述  Security Transponder (HITAG2)
PDF  32 Pages
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制造商  PHILIPS [NXP Semiconductors]
网页  http://www.nxp.com
标志 PHILIPS - NXP Semiconductors

PCF7936AS3851 数据表(HTML) 21 Page - NXP Semiconductors

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NXP Semiconductors
Product Specification
Security Transponder (HITAG2)
PCF7936AS
2010 May 04
21
CONFIDENTIAL
7.5 Read Only Modes
If the device is configured for one of three Read Only
modes, it will cyclically transmit data while operating in
READ ONLY state. The corresponding Read Only mode is
selected by the configuration bit MS1 and MS0, located in
the EEPROM, see section 7.1.4.
In Read Only mode, the data rate and coding is fixed as
specified and cannot be altered for the corresponding
mode. Data is transmitted until an LF Field Power-On
Reset terminates the READ ONLY state.
7.5.1
ISO 11784/5 (MS1 = 0, MS0 = 0)
If the Read Only mode ISO 11784/85 is selected, the
device cyclically transmits user page 4 to 7, see Figure 16.
The rate is fixed to 32 TO per bit (TBIT = 32 TO) and CDP
encoding is applied.
7.5.2
MIRO Mode (MS1 = 0, MS0 = 1)
If the Read Only mode MIRO is selected, the device
cyclically transmits user page 4 to 5, see Figure 17.
The rate is fixed to 64 TO per bit (TBIT = 64 TO) and
Manchester encoding is applied.
7.5.3
PCF7931/30/35 (MS1 = 1, MS0 = 0)
If the Read Only mode PCF7931/30/35 is selected, the
device cyclically transmits user page 4 to 7, while inserting
a PMC pattern, as known from the PIT transponder family
(PCF7931/30), see Figure 18.
However, the modified PMC pattern implemented for the
PCF7936AS does not fully comply with the one used for the
PIT family.
The rate is fixed to 64 TO per bit (TBIT = 64 TO) and CDP
encoding is applied.
SEND to
Transponder
RECEIVED from
Transponder
tWAIT,RO
bit 31 ............ bit 0
page 4
page 5
page 6
bit 31 ............ bit 0
bit 31 ............ bit 0
page 4
bit 31 ............ bit 0
bit 31 ............ bit 0
page 7
Figure 16. Sequence for ISO 11784/85 Read Only mode
SEND to
Transponder
RECEIVED from
Transponder
tWAIT,RO
page 4
page 5
page 4
bit 31 ............ bit 0
bit 31 ............ bit 0
bit 31 ............ bit 0
Figure 17. Sequence for MIRO Read Only mode
SEND to
Transponder
RECEIVED from
Transponder
tWAIT,RO
bit 31 ............ bit 0
page 4
page 5
page 6
bit 31 ............ bit 0
page 4
bit 31 ............ bit 0
bit 31 ............ bit 0
page 7
192 TO
64 TO
128 TO
modified PMC
bit 31 .....
Figure 18. Sequence for PCF7931/30/35 Read Only mode



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