Nec Network Controller uPD98502 Manuel d'utilisateur télécharger pdf (Page 196)

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CHAPTER 3 SYSTEM CONTROLLER

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Preliminary User’s Manual S15543EJ1V0UM

3.2.9 S_IOR (IO Port Register)

The IO port register “S_IOR” is a read-write and 32-bit word-aligned register. IO port register is used to indicate the

status of software. Each bit of the following POM_OUT fields is connected to the external IO port (POM[7:0]) directly.

S_IOR is initialized to 0 at reset and contains the following fields:

Bits Field R/W Default Description

31:8 Reserved R/W 0 Hardwired to 0.

7 POM_OUT7 R/W 0 Set output level for POM7 pin:

0 = deassert POM7.

1 = assert POM7.

6 POM_OUT6 R/W 0 Set output level for POM6 pin:

0 = deassert POM6.

1 = assert POM6.

5 POM_OUT5 R/W 0 Set output level for POM5 pin:

0 = deassert POM5.

1 = assert POM5.

4 POM_OUT4 R/W 0 Set output level for POM4 pin:

0 = deassert POM4.

1 = assert POM4.

3 POM_OUT3 R/W 0 Set output level for POM3 pin:

0 = deassert POM3.

1 = assert POM3.

2 POM_OUT2 R/W 0 Set output level for POM2 pin:

0 = deassert POM2.

1 = assert POM2.

1 POM_OUT1 R/W 0 Set output level for POM1 pin:

0 = deassert POM1.

1 = assert POM1.

0 POM_OUT0 R/W 0 Set output level for POM0 pin:

0 = deassert POM0.

1 = assert POM0.

1 2 ... 191 192 193 194 195 196 197 198 199 200 201 ... 594 595

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Nec Network Controller uPD98502 Manuel d'utilisateur Page 196

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