PCI1221 datasheet(75/123 Pages) TI

75 / 123 page

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

general-purpose input register

Bit

Name

General-purpose input

Type

Default

General-purpose input

Type:

Read only (see individual bit descriptions)

Offset:

ACh (function 0)

Default:

00XXh

Description: The general-purpose input register provides the logical value of the data input from the GPI

terminals, MFUNC5:4 and MFUNC2:0. Access this register only through function 0. See

Table 32 for a complete description of the register contents.

Table 32. General-Purpose Input Register

BIT

SIGNAL

TYPE

FUNCTION

15-5

RSVD

Reserved. Bits 15-5 are read only and return 0 when read. Write transactions have no effect.

GPI4_DATA

GPI4 Data Bit. The value read from bit 4 represents the logical value of the data input from the

MFUNC5 terminal. Write transactions have no effect.

GPI3_DATA

GPI3 Data Bit. The value read from bit 3 represents the logical value of the data input from the

MFUNC4 terminal. Write transactions have no effect.

GPI2_DATA

GPI2 Data Bit. The value read from bit 2 represents the logical value of the data input from the

MFUNC2 terminal. Write transactions have no effect.

GPI1_DATA

GPI1 Data Bit. The value read from bit 1 represents the logical value of the data input from the

MFUNC1 terminal. Write transactions have no effect.

GPI0_DATA

GPI0 Data Bit. The value read from bit 0 represents the logical value of the data input from the

MFUNC0 terminal. Write transactions have no effect.

PCI1221 датащи(PDF) 75 Page - Texas Instruments