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August ’01 Chapter 2. Electrical Description
2.10.3.4 Wake Pattern Detection Flag 'NO_WAKE'
If the NO_WAKE flag is set no Wake Pattern check is performed and the Control Unit
switches directly to Transparent Mode if VWAKE-A threshold is exceeded.
2.10.3.5 Write Distance Expander 2 Flag 'NO_WDE2'
If the NO_WDE2 flag is set the Wake Detector of RF2 input is completely disabled. The RF2
input should be connected to VCL externally in this case. Standby current consumption is re-
duced due to this.
2.10.3.6 Write Distance Expander 3 Flag 'NO_WDE3'
If the NO_WDE3 flag is set the Wake Detector of RF3 input is completely disabled. In this
case the RF3 input should be connected to VCL externally. Standby current consumption is
reduced due to this.
2.10.3.7 CLKA Output Disable Flag ‘NO_CLKA’
If the NO_CLKA flag is set, the CLKA/M output does not provide a clock when WAKE is
activated. This prevents back coupling of interference to the sensitive RF inputs due to not
optimized PCB layout.
The option can be used at identification devices, which do not require the CLKA. This is the
case, if the microcomputer is able to measure period duration or if the data (EOBA) includes
Table 5: Counter Definition for Pulse Position Demodulation
Pulse Position Modulation PPM Threshold
DEC Chdet Thdet Nom.[µs] MSB LSB
0- -0000
1 8 59 0001
2 16 119 0010
3 24 179 0011
4 32 238 0100
5 40 298 0101
6 48 358 0110
7 56 417 0111
8 64 477 1000
9 72 537 1001
10 80 596 1 0 1 0
11 88 656 1 0 1 1
12 96 715 1 1 0 0
13 104 775 1 1 0 1
14 112 112 1 1 1 0
15 120 894 1 1 1 1
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