CLRC632 Datasheet, PDF (114/163 Pages) NXP Semiconductors – Multiple Protocol Contactless Reader IC

Philips Semiconductors
Multiple Protocol Contactless Reader IC
Product Specification Rev. 3.0; May 2003
CL RC632
18.3.1 BASIC STATES
18.3.2 STARTUP COMMAND 3F_HEX
Command
StartUp
Code_hex
3F
Action
Runs the Reset- and Initialisation Phase
Note: This command can not be activated by
software, but only by a Power-On or Hard
Reset
Arguments and Data Returned Data
-
-
The StartUp-Command runs the Reset- and Initialisation Phase. It does not need or return any data. It can
not be activated by the µ-Processor but is started automatically after one of the following events:
• Power On Reset caused by power up at Pin DVDD
• Power On Reset caused by power up at Pin AVDD
• Negative Edge at Pin RSTPD
The Reset-Phase defines certain register bits by an asynchronous reset. The Initialisation-Phase defines
certain registers with values taken from the E²PROM.
When the StartUp-Command has finished, the Idle-Command is entered automatically.
Notes:
• The µ-Processor must not write to the CL RC632 as long as the CL RC632 is busy executing the
StartUp-Command. To ensure this, the µ-Processor shall poll for the Idle-Command to determine the
end of the Initialisation Phase (see also chapter 11.4).
• As long as the StartUp-Command is active, only reading from page 0 of the CL RC632 is possible.
• The StartUp-Command can not be interrupted by the µ-Processor.
18.3.3 IDLE COMMAND 00_HEX
Command _Codehex
Action
Idle
00
No action, cancels current command execution
Arguments and Data
-
Returned Data
-
The Idle-Command switches the CL RC632 to its inactive state. In this Idle-state it waits for the next
command. It does not need or return any data. The device automatically enters the Idle-state when a
command finishes. In this case the CL RC632 simultaneously initiates an interrupt request by setting bit
IdleIRq. Triggered by the µ-Processor, the Idle-Command may be used to stop execution of all other
commands (except the StartUp Command). In that case no IdleIRq is generated.
Remark: Stopping a command with the Idle Command does not clear the FIFO buffer content.
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