Delta Tau PMAC2A-PC/104 Manual descarregar pdf (Página 12)

PMAC2A-PC104 Hardware Manual

6 Baseboard Hardware Setup

E13: Firmware Load Jumper – If jumper E13 is ON during power-up/reset, the board comes up in

“bootstrap mode”, which permits the loading of new firmware into the flash-memory IC on the board.

When the PMAC Executive program tries to establish communications with a board in this mode, it will

automatically detect that the board is in bootstrap mode and ask you what file you want to download as

the new firmware.

Jumper E13 must be OFF during power-up/reset for the board to come up in normal “operational mode”.

CPU Jumper Configuration

E15A-E15C: Flash Memory Bank Select Jumpers – The flash-memory IC in location U10 on the

PMAC2A-PC/104 base board has the capacity for eight separate banks of firmware, only one of which

can be used at any given time. The eight combinations of settings for jumpers E15A, E15B, and E15C

select which bank of the flash memory is used. In the factory production process, firmware is loaded only

into Bank 0, which is selected by having all of these jumpers OFF.

E10-E12: Power-Up State Jumpers – Jumper E10 must be OFF, jumper E11 must be ON, and jumper

E12 must be ON, in order for the CPU to copy the firmware from flash memory into active RAM on

power-up/reset. This is necessary for normal operation of the card. (Other settings are for factory use

only.)

E14: Watchdog Timer Jumper – Jumper E14 must be OFF for the watchdog timer to operate. This is a

very important safety feature, so it is vital that this jumper be OFF in normal operation. E14 should only

be put ON to debug problems with the watchdog timer circuit.

W1: Flash chip select – Jumper W1 in position 1-2 selects a 28F320J3A part for the U10 flash chip.

Jumper W1 in position 2-3 selects a 28F320J5A part for the U10 flash chip. This jumper is installed in

factory and must not be changed from its default state.

Communication Jumpers

E18-E19: PC/104 Bus Base Address Control – Jumpers E18 and E19 on the PMAC2A-PC/104

baseboard determine the base address of the card in the I/O space of the host PC's bus. Together, they

specify four consecutive addresses on the bus where the card can be found. The jumpers form the base

address in the following fashion:

E18 E19

Address

(hex)

Address

(dec)

OFF OFF $200 512

OFF ON $210 528

ON OFF $220 544

ON ON $230 560

The default base address is 528 ($210) formed with jumper E18 removed and E19 installed. This

configuration is necessary for using the USB or Ethernet ports of the ACC-2P communications board.

I/O Configuration Jumpers

E16: ADC Enable Jumper – Install E16 to enable the analog-to-digital converter circuitry ordered

through Option-12. Remove this jumper to disable this option, which might be necessary to control

motor 1 through a digital amplifier with current feedback.

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