Silicon Laboratories SI4421 Manuel d'utilisateur télécharger pdf (Page 27)

Si4702/03-C19

Rev. 1.1 27

3:2 GPIO2[1:0] General Purpose I/O 2.

00 = High impedance (default).

01 = STC/RDS interrupt. A logic high will be output unless an interrupt occurs as

described below.

10 = Low.

11 = High.

Setting STCIEN = 1 will generate a 5 ms low pulse on GPIO2 when the STC 0Ah[14] bit is

set. Setting RDSIEN = 1 will generate a 5 ms low pulse on GPIO2 when the RDSR

0Ah[15] bit is set.

1:0 GPIO1[1:0] General Purpose I/O 1.

00 = High impedance (default).

01 = Reserved.

10 = Low.

11 = High.

Bit Name Function

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 45 46

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Silicon Laboratories SI4421 Manuel d'utilisateur Page 27