HT-CM400 NXP Semiconductors, HT-CM400 Datasheet - Page 37

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

98-02-10
3.7.22 WritePit
This Proximity Reader command sets the read/write device to permanent writing mode for a PIT
transponder to write a maximum of 16 data bytes onto it (beginning at a byte-address).
The read/write device attempts continuously to synchronize on and write to a PIT transponder. If
it succeeds and all checks report positive results, the device sends a no error message via the
serial interface. After that the read/write device returns to Normal Mode.
To put the read/write device back to normal mode, a StopCommand should be sent. Do not use a
Reset, since Reset can cause undesirable side effects (resetting output pins).
Additional information:
Data can also be written to the transponder using the Password Mode (see also commands
WritePitSecurity and WritePitPassword).
C-Function: void proloc_WritePit (BYTE_T byteaddr, BYTE_T bytenmb, char *data);
Header-File: PROLBPH6.H
Serial protocol:
HOST - READ/WRITE DEVICE
byteaddr:
bytenmb:
READ/WRITE DEVICE - HOST
Status:
bytenmb+4
0x02
Status
start address of write data (0
number of data bytes to write (1
-1 ...
0 ... no error
't'
BCC
SERIAL ERROR
byteaddr bytenmb data[0]
Page 37 (104)
Rev. 1.0
byteaddr
bytenmb
......
127)
16)
data[bytenmb-1]
Communication Reader-Host
BCC
Htswp.doc/HS