HT-CM400 NXP Semiconductors, HT-CM400 Datasheet - Page 58

• Manufacturer Part Number: HT-CM400
• Description: Ht Cm400; Ht Rm440 Family; Ht Rm800 Family Interface Protocol Reader - Host
• Manufacturer: NXP Semiconductors

Communication Reader-Host
3.7.42 SetBCD
This Long Range Reader command effects that a new BCD (BitClockDelay) value is passed to
the DSP (Digital Signal Processor) and written into the EEPROM of the read/write device. This
value adjusts the timing of the read/write device in accordance to the connected antenna.
A new adjustment may be necesarry whenever a new type of antenna is connected to the
read/write device.
Bits 4-7 of -bitclockdata- represent the BCD value. If Bit 3 of -bitclockdata- is set to 0, a FFT
(Fast Fourier Transformation) of the DSP with the new BCD value is startet in addition.
Standard value stored in the EEPROM:
C-Function: void proloc_SetBCD (BYTE_T bitclockdata);
Header-File: PROLIB6.H
Serial protocol:
HOST - READ/WRITE DEVICE
bitclockdata:
READ/WRITE DEVICE - HOST
Status:
Htswp.doc/HS
0x03
0x02
bitclockdata = 0x90
Status
bitclockdelay
'F'
Bit 3
bitclockdelay: 0 ... 15
mode:
-1 ...
-8 ...
7
0 ... no error
BCC
bitclockdata
SERIAL ERROR
ACKNOWLEDGEMENT ERROR
The DSP did not send a correct acknowledge.
The error leads to a reset of the read/write device.
bitclockdelay
Bit 2
0 ... start a FFT
1 ... no FFT
6
BCC
dec
possible
bitclockdelay
Page 58 (104)
Rev. 1.0
Bit 1
5
bitclockdelay
Bit 0
4
mode
3
2
0
1
0
98-02-10
0
0