Hitag S 2048 2mm x 12mm Glass Tags
Hitag S
Hitag S, by NXP Semiconductor, is targeted at the high volume livestock tracking and food safety market, it features an innovative ultra low power design specifically designed to provide for the longer reading ranges required in this application area.
It is the third chip in the Hitag series, which also includes the Hitag 1 and Hitag 2. It's notable features include read/write memory, 48 bit encryption, and collision resolution (for reading multiple tags at once).
Download the Hitag S Data Sheet for protocol, configuration, and memory layout information.
Specifications
- Note: The Hitag S comes in several memory capacities and physical form factors. These specs are specifically for the 2x12mm Hitag S 2048 capsule tag that I have.
Chip Type |
Hitag S 2048; read/write |
* test conditions |
|
|
|||
Physical |
Frequency |
125 kHz |
|
Diameter |
2.0 mm +/- 0.15mm |
|
|
Length |
12.0 mm +/0 0.4mm |
|
|
Weight |
95mg |
|
|
Material |
BioGlass 8625 |
|
|
Color |
Transparent |
|
|
|
|||
Electrical |
Operating Frequency |
125 kHz +/- 6 kHz |
* At room temperature |
|
|||
Chemical |
Water Immersion IP68 |
|
20 deg C, 24h, 1m |
Aqueous solution of salts |
|
20 deg C, 100h |
|
Alcohol, oil, HLC (10%) |
|
20 deg C, 100h |
|
Ammoniac |
|
20 deg C, 100h |
|
|
|||
Mechanical |
Vibration |
IEC 68.2.6 |
6g, 14...200Hz |
Shock |
IEC 68.2.29 |
30g, 18ms, 3 axis, 1084 times/axis |
|
|
|||
Thermal |
Storage: |
-40 to +90 Degrees C |
1 x 1000h |
|
+120 Degrees C |
1 x 100 h |
|
Operating: |
-40 to +85 Degrees C |
|
|
Configuration and Memory Layout
This information is contained in the Hitag S data sheet (above), but is possibly a little disparate and cryptic. Many thanks to Joe Wooller for helping piece this together. The Hitag S chip's memory is laid out in a series of blocks; each block contains 4 pages, and each page has 4 bytes.
Page 00 contains the chip's 4-byte UID, which is programmed at manufacture time and read-only.
Page 01 contains 1 reserve byte, and 3 configuration bytes. Some of the configuration is read-only, and some of the configuration can only be programmed once - so it's important to understand the configuration layout and settings before you do anything with your chips. Page one has four bytes, laid out as follows:
Byte 3 |
Byte 2 |
Byte 1 |
Byte 0 |
Reserved |
CON 2 |
CON 1 |
CON 0 |
CON 0 is arranged as follows:
Bit 7 |
Bit 6 |
Bit 5 |
Bit 4 |
Bit 3 |
Bit 2 |
Bit 1 |
Bit 0 |
Reserved |
MEMT1 |
MEMT0 |
|||||
Where "MEMT_1 MEMT_0" is "00" for a 32 bit chip, "01" for a 256 bit chip, or "10" for a 2048 bit chip.
CON 1 is arranged as follows:
Bit 7 |
Bit 6 |
Bit 5 |
Bit 4 |
Bit 3 |
Bit 2 |
Bit 1 |
Bit 0 |
AUT |
TTFD |
TTFDR1 |
TTFDR0 |
TTFM1 |
TTFM0 |
LCON |
LKP |
Where:
Bit Name |
Explanation |
AUT |
Is 0 for "plain" mode and 1 for "authentication" mode |
TTFD |
Determines the encoding used during Transponder Talks First (TTF) communication: 0 for Manchester, 1 for BiPhase encoding |
TTFDR1 TTFDR0 |
Determines the data rate used during TTF communication. "00" for 4 kBits, "01" for 8 kBit, "10" for 2 kBit, and "11" for 2 kBit w/ pigeon race standard |
TTFM1 TTFM0 |
Determines the pages read during TTF communication. "00" to disable TTF mode (ie RTF), "01" for Page4-Page5, "10" for Page4-Page7, and "11" for Page 4 |
LCON |
Important: LCON is One-Time-Programmable, meaning once it's set, it's set! So be careful with it. Set it to "0" to leave the configuration page in read/write mode. If you set it to "1" then this configuration byte (CON1) is read-only, and CON2 becomes One-Time-Programmable as well. You will be unable to change this bit once it's set. |
LKP |
Access rights key and password settings. "0" for "read/write" and "1" for read-only in plain mode or no-access in authentication mode (see AUT bit) |
CON 2 is arranged as follows:
Bit 7 |
Bit 6 |
Bit 5 |
Bit 4 |
Bit 3 |
Bit 2 |
Bit 1 |
Bit 0 |
LCK7 |
LCK6 |
LCK5 |
LCK4 |
LCK3 |
LCK2 |
LCK1 |
LCK0 |
Where the LCK x bit locks various page ranges throughout the memory map. See page 20 in the data sheet for details... The important thing here is that each of these bits is One-Time-Programmable if LCON in CON1 is "1", and R/W if LCON in CON1 is "0".
Where To Buy
There are several places where you can purchase these chips online. I purchased mine from Brett at Sleep All Day for $10 + $2.00 shipping.
CategoryRFIDTags