ISP1561 データシートの表示（PDF） - Philips Electronics

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ISP1561

Hi-Speed USB PCI host controller

Philips Electronics 

Philips Semiconductors

ISP1561

USB PCI host controller

Table 38: PMCSR_BSE register: bit description

Bit

Symbol Description

7

BPCC_En Bus Power/Clock Control Enable

1 — Indicates that the bus power/clock control mechanism as

defined in Table 39 is enabled.

0 — Indicates that the bus/power control policies as defined in

Table 39 have been disabled.

When the Bus Power/Clock Control mechanism is disabled, the

bridge’s PMCSR PS (Power State) field cannot be used by the

system software to control the power or clock of the bridge’s

secondary bus.

6

B2_B3#

B2/B3 support for D3hot: The state of this bit determines the

action that is to occur as a direct result of programming the

function to D3hot.

5 to 0

-

1 — Indicates that when the bridge function is programmed to

D3hot, its secondary bus’s PCI clock will be stopped (B2).

0 — Indicates that when the bridge function is programmed to

D3hot, its secondary bus will have its power removed (B3).

This bit is only meaningful if bit 7 (BPCC_En) is logic 1.

reserved

Table 39: PCI bus power and clock control

Originating device’s bridge PM state Secondary bus PM state

D0

D1

D2

D3hot

B0

B1

B2

B2, B3

D3cold

B3

Resultant actions by bridge

(either direct or indirect)

none

none

clock stopped on secondary bus

clock stopped and VCC removed from

secondary bus (B3 only). For definition

of B2_B3#, see Table 38.

none

Data register (address: value read from address 34H + 7H): The Data register is

an optional, 1-byte register that provides a mechanism for the function to report state

dependent operating data, such as power consumed or heat dissipation. Table 40

shows the bit description of the register.

Table 40: Data register: bit description

Bit

Symbol

Access

Value

7 to 0 DATA[7:0] R

00H

Description

DATA: This register is used to report the state dependent data

requested by the D_S (Data_Select) field. The value of this register

is scaled by the value reported by the DS (Data_Scale) field.

9397 750 10015

Product data

Rev. 01 — 06 February 2003

© Koninklijke Philips Electronics N.V. 2003. All rights reserved.

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