28140 Parallax Inc, 28140 Datasheet - Page 9

• Manufacturer Part Number: 28140
• Description: READER MODULE RFID
• Manufacturer: Parallax Inc

Specifications of 28140

• Rf Type: Read Only
• Frequency: 125kHz
• Features: Single 5V Power Supply
• Package / Case: Module
• Product: Microcontroller Accessories
• Data Bus Width: 8 bit
• Clock Speed: 125 KHz
• Interface Type: USB
• Operating Supply Voltage: 5.5 V
• Board Size: 46.99 mm x 69.22 mm x 21.84 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

SevenBit
Inverted
Open
Baud
#SELECT $STAMP
#ENDSELECT
LastTag
#DEFINE __No_SPRAM = ($STAMP < BS2P)
' -----[ Variables ]-------------------------------------------------------
#IF __No_SPRAM #THEN
#ELSE
#ENDIF
tagNum
idx
char
' -----[ EEPROM Data ]-----------------------------------------------------
Tag1
Tag2
Tag3
Name0
Name1
Name2
Name3
' -----[ Initialization ]--------------------------------------------------
Reset:
Parallax, Inc. • RFID Reader Module (#28140) •Updated 02/2006 v1.1
#CASE BS2, BS2E
#CASE BS2SX
#CASE BS2P
#CASE BS2PE
#CASE BS2Px
buf
chkChar
HIGH Enable
LOW Latch
TmAdj
FrAdj
TmAdj
FrAdj
TmAdj
FrAdj
TmAdj
FrAdj
TmAdj
FrAdj
CON
CON
CON
CON
CON
CON
CON
CON
CON
CON
CON
CON
CON
CON
CON
VAR
VAR
VAR
VAR
VAR
DATA
DATA
DATA
DATA
DATA
DATA
DATA
$2000
$4000
$8000
T2400
$100
$100
$280
$066
$3C5
$044
$100
$0AA
$607
$2A
3
Byte(10)
Byte
Nib
Byte
Byte
"0F0184F20B"
"0F01D9D263"
"04129C1B43"
"Unauthorized", CR, 0
"George Johnston", CR, 0
"Dick Miller", CR, 0
"Mary Evans", CR, 0
' x 1.0 (time adjust)
' x 1.0 (freq adjust)
' x 2.5
' x 0.4
' x 3.77
' x 0.265
' x 1.0
' x 0.665
' x 6.03
' x 0.166
' does module have SPRAM?
' RFID bytes buffer
' character to test
' from EEPROM table
' tag byte index
' character from table
' valid tags
' turn of RFID reader
' lock the door!
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