TMPR4937 datasheet(297/552 Pages) TOSHIBA

297 / 552 page

Chapter 10 PCI Controller

10-39

10.4.14 G2P Timeout Count Register (G2PTOCNT)

0xD040

The Retry Timeout field corresponds to the Retry Timeout Value Register of the PCI Configuration

Space, and the TRDY Timeout field corresponds to the TRDY Timeout Value Register of the PCI

Configuration Space.

This register cannot be accessed when the PCI Controller is in the Satellite mode.

Reserved

: Type

: Initial value

RETRYTO

TRDYTO

R/W

: Type

0x80

: Initial value

Bits

Mnemonic

Field Name

Description

Read/Write

31:16

Reserved

⎯

15:8

RETRYTO

Retry Timeout

Retry Time Out (Default: 0x80)

Sets the maximum number of retries to accept when operating as the

initiator on the PCI Bus. Ends with an error when receiving more retry

terminations than the set maximum number.

Setting a “0” disables this timeout function.

Note: Generally, disable retry time-out detection by setting this field to zero.

Some PCI devices invoke more than 128 retries at normal times.

R/W

7:0

TRDYTO

TRDY Timeout

TRDY Time Out (Default: 0x80)

Sets the maximum value of the time to wait for assertion of the TRDY*

signal when operating as the initiator on the PCI Bus.

Setting a “0” disables this timeout function.

Note: Generally, disable TRDY time-out detection by setting this field to

zero. Some PCI devices exhibit a TRDY delay longer than 128 PCI

clocks at normal times.

R/W

Figure 10.4.12 G2P Timeout Count Register

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