Hardware Setup | 7 |
JP16: PCI Bus Asynchronous/Synchronous Jumper
Asynchronous and synchronous (default) PCI bus frequency settings are available.
PCI Bus Setting | JP16 |
1
Asychronous
1
Synchronous
Divides the host bus by 2 to get the Asynchronous setting, and sets the PCI bus on 32MHz to get the synchronous setting. Set JP16 to Synchronous mode when the system is unstable.
Host Bus | PCI Bus Frequency | PCI Bus Frequency |
(CPU Bus) | (Synchronous) | (Asynchronous) |
|
|
|
50 MHz* | 25 MHz | 32 MHz |
|
|
|
55 MHz* | 27.5 MHz | 32 MHz |
|
|
|
60 MHz | 30 MHz | 32 MHz |
|
|
|
66 MHz | 33.3 MHz | 32 MHz |
|
|
|
75 MHz** | 37.5 MHz | 32 MHz |
|
|
|
*: Do not use Asynchronous setting when the host bus frequency is 50MHz or 55MHz.
**: Do not use Synchronous setting when the host bus frequency is 75 MHz.
