Intermec 6804DM Technical Reference Manual page 91

SECTION 4 Operation
The card specific data sent to the printer as data along with
these reader commands is sent to the card and any re-
sponse (data and/or status word – a 2 byte sequence) from
the card is returned to the host. Consult ISO--7816 part 4
for T=0 commands to the smart card, which are included as
the data for the SR and SW commands to the card reader
and meaning of responses.
Command: {SP:data} Controls Power to the Smart card –
requires data.
Response for power ON: {SP:<ATR data>}
Where ATR data is Answer To Reset data returned by card
Response for power OFF: {SP!}
SP data: 0 (zero) – Turn power off
1 (one) – Turn power on (printer returns ATR for
async card)
Command: {SW:data} ICC card write – requires command
to be written to card (ISO--7816)
Uses Sync or if Async, protocol selected at configuration
Returns status response from card preceded by {SW!
Command: {SR:data} ICC card read – requires command/
data to be written to card (ISO--7816)
Uses Sync or of Async, protocol selected at configuration
Returns data and status response with data from card pre-
ceded by {SR!
Implemented as required (future):
Command: {SM:data} Smart Memory Card – requires
command/data to be written to card
2
Uses I C or SPI communications to card
Subcommands for read and write control the reader as well
as the card
Intermec Portable Printers Technical Reference Manual 4-43