UM0932 datasheet(19/43 Pages) STMICROELECTRONICS

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UM0932

Host interface

3.2.9

Host interface timeouts

All the default values of host interface timeouts are reported in Table 9.

3.3

Command codes

Each command frame exchanged between the external host and the ST7580 carries

a command, identified by a unique command code (declared in the command code field as

in Figure 8:)

It is possible to distinguish four different command types:



Request commands sent by the external host to use a ST7580 service



Confirm commands sent by the ST7580 to answer a previous request command

correctly executed



Error commands sent by the ST7580 to answer a previous request command not

executed



Indication commands sent by the ST7580 to inform the external host about a change

on its services; these are unsolicited commands not following any request.

Request commands

Request commands are sent by the external host to perform an action on ST7580. ST7580

executes the command and answers the external host through either a confirm command or

an error command.

Table 10 shows all request commands: their syntax and data fields are explained in the next

paragraphs.

Table 9. Communication protocol timeouts

Timeout

Default value [ms]

Tic

Tack

Tsr

200

Table 10. Request command codes

Group

Request command

Code

Reset

BIO_ResetRequest (Section 3.3.1)3Ch

MIB

MIB_WriteRequest (Section 3.3.4)08h

MIB_ReadRequest (Section 3.3.6)0Ch

MIB_EraseRequest (Section 3.3.8)10h

Ping

PingRequest (Section 3.3.10)2Ch

Data

PHY_DataRequest (Section 3.3.12)24h

DL_DataRequest (Section 3.3.15)50h

SS_DataRequest (Section 3.3.19)54h

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