CLRC63201TSLASH0FE datasheet(130/163 Pages) PHILIPS

130 / 163 page

Philips Semiconductors

Product Specification Rev. 3.0; May 2003

Multiple Protocol Contactless Reader IC

CL RC632

130

Confidential

18.6 Commands to Access the E²PROM

18.6.1 WRITEE2 COMMAND 01HEX

18.6.1.1 Overview

Command

Codehex

Action

Arguments and

Data passed via

FIFO

Returned

Data via

FIFO

WriteE2

Get data from FIFO buffer and write it to the E²PROM

Start Address LSB

Start Address MSB

Data Byte Stream

The WriteE2-Command interprets the first two bytes in the FIFO buffer as E²PROM starting byte-address.

Any further bytes are interpreted as data bytes and are programmed into the E²PROM, starting from the

given E²PROM starting byte-address. This command does not return any data.

The WriteE2-Command can only be started by the µ-Processor. It will not stop automatically but has to be

stopped explicitly by the µ-Processor by issuing the Idle-Command.

18.6.1.2 Programming Process

One byte up to 16 byte can be programmed into the EEPROM in one programming cycle. The time needed

will be in any case about 5.8ms.

The state machine copies all data bytes prepared in the FIFO buffer to the E²PROM input buffer. The internal

E²PROM input buffer is 16 byte long, which is equal the block size of the E²PROM. A programming cycle is

started either if the last position of the E²PROM input buffer is written or if the last byte of the FIFO buffer has

been fetched.

As long as there are unprocessed bytes in the FIFO buffer or the E²PROM programming cycle still is in

progress, the flag E2Ready is 0. If all data from the FIFO buffer are programmed into the E²PROM, the flag

E2Ready is set to1. Together with the rising edge of E2Ready the interrupt request flag TxIRq indicates a 1.

This may be used to generate an interrupt when programming of all data is finished.

After the E2Ready bit is set to 1, the WriteE2-Command may be stopped by the µ-Processor by issuing the

Idle-Command.

Note: During the E2PROM programming indicated by E2Ready = 0 the WRITEE2 command cannot be

stopped by any other command.

CLRC63201T/0FE Datasheet(PDF) 130 Page - NXP Semiconductors

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