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| 型號(hào)： | YKNIFEX4HW |
| 英文描述： | IC APEX 20KE FPGA 100K |
| 中文描述： | 耶洛奈夫參考平臺(tái)硬件設(shè)計(jì)手冊(cè) |
| 文件頁數(shù)： | 13/24頁 |
| 文件大?。?/td> | 186K |
| 代理商： | YKNIFEX4HW |
Yellowknife X4 Hardware Reference Manual
Page 19 /22
Motorola Inc.
Unrestricted Distribution Permitted
98 Feb 20
ture; in particular, the soft-start/soft-stop functions of COP will not work unless the
jumper is installed properly.
4.1.5 Interrupt Flow Jumper
Jumper Jx is used to control the routing of interrupt signals to the processor. In positions
1-2, interrupts ow from the Winbond and Super I/O ISA and PCI interrupt into the Hydra
MPIC core, merging with internal Hydra interrupt, and then on to the processor. In posi-
tions 2-3, interrupts bypass the Hydra MPIC and go directly to the processor.
Note that to allow the embedde mode, PCI interrupts are connected to both the Hydra and
the Winbond. Generally, only one or the other of these devices should be programmed to
sense the PCI interrupt lines.
4.1.6 Processor Voltage Selection
Jumpers J45, J46, J47, J55, and J56 are used to optionally override the interposer voltage
setting and impose a user-selected setting. To accomodate this, the top-level trace between
pins 1 and 2 of all of these jumpers must be cut (use an X-acto knife); then, the jumpers
(which are usually not installed) must be soldered in (use 3-position Berg headers). Once
done, the jumpers allow forcing a VID(0:4) signal high, forcing low, or allowing the inter-
poser to control. For more details, refer to Figure 1, “Optional VID Control,” on page 7.
4.1.7 Soft-start Override
By installing a shorting-plug on Header J44, pins 20 to pins 22 (i.e. on the side), the ATX
power supply is forced on. This allows embedded customer s to ignore APC power con-
trol issues, and the MacOS related power signals.
Table 8: COP Jumper Settings
J39
Function
1
2
3
Normal operation; power management uses QREQ*/QACK*
COP operation; QACK* forced low.
Table 9: Interrupt Jumper Settings
J39
Function
1
2
3
MacOS mode: Interrupts ow through Hydra MPIC.
Embedded mode: Interrupts bypass Hydra MPIC
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