HyperTransport™ System Architecture

The Low Speed Signals

Power OK (PWROK) AndReset (RESET#)

PWROK used with RESET# indicates to HyperTransport devices whether a Cold or Warm Reset is in progress. Which system logic component is responsible for managing the PWROK and RESET# signals is beyond the scope of the HyperTransport specification, but timing and use of the signals are defined. The basic use of the signals includes:

• At power up, PWROK is asserted by system logic when it can be guaranteed that system power and clocks related to HyperTransport are within proper limits.

• RESET# is asserted by system logic to indicate that a reset is required. The state of PWROK when RESET# is seen asserted indicates the type of reset to be performed. PWROK and RESET# both asserted is a warm reset; ...