Target Board Information
STMicroelectronics STB1 Extended HARP (mb350)
Switch settings
|
|
There are three DIP switches on the MB350.
| SW1 1 |
software use only |
| SW1 2 |
software use only |
| SW1 3 |
software use only |
| SW1 4 |
software use only |
| SW2 1 |
MODE3 |
PCI speed select
1 2 mode PCI
off off 0 66
on off 1 33
off on 2 25
on on 3 0
|
| SW2 2 |
MODE4 |
| SW2 3 |
MODE6 |
CLKIO 27MHz output
3 pin
off 0 disable CKIO
on 1 enable CKIO
|
| SW2 4 |
MODE8 |
endian select
4 pin
off 0 big
on 1 little
|
| SW3 1 |
MODE0 |
Speed select
1 2 3 mode CPU STBUS PER LMI
off off off 0 100 50 25 25
on off off 1 133 88 44 88
off on off 2 150 100 50 100
on on off 3 166 110 55 110
off off on 4 200 100 50 100
on off on 5 250 125 32 125
off on on 6 0 0 0 0
on on on 7 50 25 25 25
|
| SW3 2 |
MODE1 |
| SW3 3 |
MODE2 |
| SW3 4 |
MODE5 |
Crystal as clock input
4 pin
off 0 external clock
on 1 crystal
|
Switch on results in the corrisponding pin being high. Off results in low.
All switches are readable from software through EPLD registers:
| Register |
Address |
Bit |
| 7 |
6 |
5 |
4 |
3 |
2 |
1 |
0 |
SWITCH1 |
EPLD+0x00040000 |
SW2 4 |
SW2 3 |
SW2 2 |
SW2 1 |
SW3 4 |
SW3 3 |
SW3 2 |
SW3 1 |
SWITCH2 |
EPLD+0x00080000 |
- |
- |
STEM1 |
STEM0 |
SW3 4 |
SW3 3 |
SW3 2 |
SW3 1 |
Note that the EPLD equations use a different switch numbering scheme:
| Switch |
EPLD name |
| SW1 |
switch3 |
| SW2 |
switch2 |
| SW3 |
switch1 |
|
