ST25DV04KC datasheet(83/203 Pages) STMICROELECTRONICS

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Table 102. Response error code definition

Error code

Meaning

01h

Command is not supported.

02h

Command is not recognized (format error).

03h

The option is not supported.

0Fh

Error with no information given.

10h

The specified block is not available.

11h

The specified block is already locked and thus cannot be locked again.

12h

The specified block is locked and its contents cannot be changed.

13h

The specified block was not successfully programmed.

14h

The specified block was not successfully locked.

15h

The specified block is protected in read.

7.5

Timing definition

t1: ST25DVxxKC response delay

Upon detection of the rising edge of the EOF received from the VCD, the ST25DVxxKC waits for a t1nom time

before transmitting its response to a VCD request or switching to the next slot during an inventory process. Values

of t1 are given in Table 103. Timing values.

t2: VCD new request delay

t2 is the time after which the VCD may send an EOF to switch to the next slot when one or more ST25DVxxKC

responses have been received during an Inventory command. It starts from the reception of the EOF from the

ST25DVxxKCs.

The EOF sent by the VCD may be either 10% or 100% modulated regardless of the modulation index used for

transmitting the VCD request to the ST25DVxxKC.

t2 is also the time after which the VCD may send a new request to the ST25DVxxKC, as described in

Figure 38. ST25DVxxKC protocol timing.

Values of t2 are given in Table 103.

t3: VCD new request delay when no response is received from the ST25DVxxKC

t3 is the time after which the VCD may send an EOF to switch to the next slot when no ST25DVxxKC response

has been received.

The EOF sent by the VCD may be either 10% or 100% modulated regardless of the modulation index used for

transmitting the VCD request to the ST25DVxxKC.

From the time the VCD has generated the rising edge of an EOF:

•

If this EOF is 100% modulated, the VCD waits for a time at least equal to t3min for 100% modulation before

sending a new EOF.

•

If this EOF is 10% modulated, the VCD waits for a time at least equal to t3min for 10% modulation before

sending a new EOF.

ST25DV04KC ST25DV16KC ST25DV64KC

Timing definition

DS13519 - Rev 3

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