TMPR4937 datasheet(434/552 Pages) TOSHIBA

434 / 552 page

Chapter 14 AC-link Controller

14-28

14.4.10 ACLC GPO Data Register

0xF744

This register specifies GPIO (slot 12) output data.

Reserved

WRPEND

GPODAT

R/W

: Type

0x00000

: Initial value

GPODAT

R/W

: Type

0x00000

: Initial value

Bit

Mnemonic Field Name

Description

Read/Write

31:20

⎯

Reserved

⎯

WRPEND: Write Pending

WRPEND

Write Pending

0: Indicates that the previous write operation is complete and the

ACGPODAT register is ready to be written.

1: Indicates that the previous write operation is not complete and

the ACGPODAT register is not yet ready to be written.

GPODAT: GPIO-Out data

R/W

19:1

GPODAT

GPIO-Out data

Reads back the value previously written to this field.

Writes data to the outgoing slot 12 bits[19:1].

⎯

Reads always ‘0’.

Figure 14.4.7 ACGPODAT Register

Writing a value into this register needs several BITCLK cycles to take effect. The software must

guarantee that no write access be executed until the previous write access takes effect (completes), by

reading the ACGPODAT.WRPEND bit prior to writing this register. If it is set for a long time, the

BITCLK signal on the AC-link is probably inactive for whatever reason.

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