CLRC632 Datasheet, PDF (112/163 Pages) NXP Semiconductors – Multiple Protocol Contactless Reader IC

Philips Semiconductors
Multiple Protocol Contactless Reader IC
Product Specification Rev. 3.0; May 2003
CL RC632
18 CL RC632 COMMAND SET
18.1 General Description
The CL RC632 behaviour is determined by an internal state machine capable to perform a certain set of
commands. The commands can be started by writing the according command-code to the Command-
Register.
Arguments and/or data necessary to process a command are mainly exchanged via the FIFO buffer.
18.2 General Behaviour
• Each command, that needs a data stream (or data byte stream) as input will immediately process the
data it finds in the FIFO buffer.
• Each command that needs a certain number of arguments will start processing only when it has received
the correct number of arguments via the FIFO buffer.
• The FIFO buffer is not cleared automatically at command start. Therefore, it is also possible to write the
command arguments and/or the data bytes into the FIFO buffer and start the command afterwards.
• Each command (except the StartUp-Command) may be interrupted by the µ-Processor by writing a new
command code into the Command-Register e.g.: the Idle-Command.
18.3 CL RC632 Commands Overview
Command Code
Action
StartUp
Idle
Transmit
Receive
3F_hex
Runs the Reset- and Initialisation
Phase.
Note: This command can not be
activated by software, but only by a
Power-On or Hard Reset
00_hex
No action; cancels current command
execution.
1A_hex
Transmits data from the FIFO buffer to
the card.
Activates receiver circuitry.
16_hex
Note: Before the receiver actually
starts, the state machine waits until the
time configured in the register RxWait
has passed.
Note: This command may be used for
test purposes only, since there is no
timing relation to the Transmit-
Command.
Arguments and Data
passed via FIFO
-
-
Data Stream
-
Returned Data see
via FIFO
Chapter
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18.3.2
-
18.3.3
-
18.4.1
Data Stream 18.4.2
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