User's Manual Part 1

13,56 MHz Multitag Reader Module, Version 0.9v
ACG Identification Technologies AT Page 29
5.3.9 Read page
This command reads a data block on a card. Size of returned data depends on the
used tag. A valid page address depends on the present tag. E.g. an Icode® tag
supports only 16 pages, an ISO15693 SRF55V10P 128 pages.
5.3.9.1 Command
Command Data
‘r’ page address (1 byte)
5.3.9.2 Answer
Answer Description
data page data (depends on tag type)
‘F’ Error: read failure
‘N’ Error: No tag in field
5.3.9.3 Page data
Page data depends on the used tag. Following table describes the default page
sizes. Internally the reader handles the correct data frame size.
Tag type Page size Description
ISO15693 4
8
As default
SRF50VxxP, EM 4135
Tagit® Var. size Depends on tag organization
Icode® 4
SR176 2
Mifare®
Ultralight
4
ISO14443A - Not supported
ISO14443B - Not supported
Figure 5-14: page data
5.3.9.4 No tag in field ‘N’
The tag does not respond. There is either no tag present or not addressed.
5.3.9.5 Read failure ‘F’
This error is displayed if the reader receives bad data. Additionally this error is
generated if a page is read which is not physically located on the card.