3. Clocking and Reset Options
54
Tsi310 User Manual
80B6020_MA001_05
3.8
Power Management and Hot-Plug
The Tsi310 is compliant with the minimum requirements of the
PCI Bus Power Management
Interface Specification (Revision 2.0),
as it supports the D0 and D3 power management states
and the power management capabilities registers. No other power management functions are
implemented by the Tsi310. Power management events (PMEs) are not supported.
The transition into a D3 power management state by the Tsi310 will be the result of either a
software action or the removal of power. The D3 state has two variants that are supported, D3
hot
and D3
cold
. When the bridge transitions from the D0 state to the D3
hot
state, the secondary bus
signals are driven to their benign state and the bridge only accepts Type 0 configuration
transactions on the primary interface. On the transition from the D3
hot
to the D0 state, all
configuration registers are returned to their reset values without the generation of a secondary
side PCI reset (S_RST#). The generation of a secondary side PCI reset after transitioning to the
DO state is supported by software writing to the bridge control register x'3E' bit 6.
The transition to the D3
cold
state occurs when power is removed from the device. The Tsi310
will be in the uninitialized D0 state once power is reapplied and the power-on sequences
associated with P_RST# and S_RST# described in
and
are complete. These power-on sequences require software to fully initialize and
configure the bridge.
The Tsi310 contains no functions to specifically assist or preclude its use in a hot-plug system.
In such an environment, each hot-plug slot must be independently controlled using an external
hot-plug controller. Such a controller is required to perform the various initialization and reset
functions described above for the slots under its control. In addition, before connecting those
slots to the rest of the bus, it must assure that the capabilities of devices plugged into the slots
match the mode and operating frequency of the bus. Presumably, the hot-plug controller will
need to remember the initialization pattern broadcast at the last bus reset. If it detects a device
with the same or greater capability than what the bus is running, it should initialize the card with
the stored pattern before connecting to the bus. If it detects a lower capability, then a bus reset is
required and the entire bus must be reconfigured.
The Tsi310 I/O and CORE supplies must be completely powered up before any of
its I/O pads — its signal I/O pads or pins — receive power. If an I/O pad is powered
up before VDD, current can be drawn from the source connected to the pad through
the Tsi310 and into VDD. This current may impact the operation or reliability of the
part.
Содержание Tsi310TM
Страница 8: ...Contents 8 Tsi310 User Manual 80B6020_MA001_05...
Страница 10: ...List of Figures 10 Tsi310 User Manual 80B6020_MA001_05...
Страница 12: ...List of Tables 12 Tsi310 User Manual 80B6020_MA001_05...
Страница 18: ...18 Tsi310 User Manual 80B6020_MA001_05...
Страница 44: ...2 Bus Operation 44 Tsi310 User Manual 80B6020_MA001_05...
Страница 58: ...3 Clocking and Reset Options 58 Tsi310 User Manual 80B6020_MA001_05...
Страница 62: ...4 Transaction Ordering 62 Tsi310 User Manual 80B6020_MA001_05...
Страница 150: ...5 Configuration Registers 150 Tsi310 User Manual 80B6020_MA001_05...
Страница 170: ...6 Signals and Pinout 170 Tsi310 User Manual 80B6020_MA001_05...
Страница 190: ...7 JTAG Boundary Scan 190 Tsi310 User Manual 80B6020_MA001_05...
Страница 196: ...8 Electrical Characteristics 196 Tsi310 User Manual 80B6020_MA001_05...
Страница 200: ...9 Package Information 200 Tsi310 User Manual 80B6020_MA001_05...
Страница 202: ...A Ordering Information 202 Tsi310 User Manual 80B6020_MA001_05...
Страница 206: ...Index 206 Tsi310 User Manual 80B6020_MA001_05...