XVME-6700A
USER
’S
MANUAL
Acromag, Inc. Tel: 248-295-0310
- 18 -
http://www.acromag.com
- 18 -
https://www.acromag.com
3.1.3 VME Configuration Switch SW4
Table 3.1.c summarizes the functions, settings, and descriptions for dip switch
SW4.
Table 3.1.c: VME Configuration Switch SW4
VME Configuration Switch SW4
Position
Function
Function Description
1-2
VME_
SYSCON
Sw.1
–
Sw.2
OFF
–
OFF : Disable VME System Controller
OFF
–
ON : Enable VME system Controller
(default)
ON
–
OFF : Enable in VME64x mode while
GA = “00001”
ON
–
ON : Enable Auto-ID mode by BGIN#3
detected low
3
SYSRESET_in
_ENA
VME SYSRESETn assertion on VME backplane
will cause a local reset (OFF by default)
4
VME64x_
AUTOID_ENA
Enable VME Auto Slot Identification Logic (ON
by default)
5
PON_FSM_
DIS
Disable PON_FSM micro-sequencer (ON by
default)
6
SYSRESET_ou
t_ENA
A local reset will generate a VME SYSRESETn
assertion on VME backplane (ON by default)
7
SPI_WR_
PROT
Enable Write Protect for SPI Flash EEPROM
configuration (ON by default)
8
SPI_CFG_
ENA
Enable SPI Flash EEPROM configuration (ON by
default)
SW4 is used to configure the VME system controller properties, as well as the
reset behavior, start-up behavior and properties of the EEPROM which holds
the FPGA firmware.
SW4-1 and SW4-2 are used to manually enable or disable the system controller
functionality of the bridge. System controller can also be automatically
enabled in 64x mode when the geographic address of the board is “00001,” or
slot 1. If both switches are on, Auto-ID mode is selected, and system controller
will be enabled if the BGIN#3 signal from the backplane is detected low at
power-up.
If SW4-3 is on, A VME SYSRESETn assertion on the backplane will case a local
reset. Otherwise, the signal will be isolated from the backplane.
If a VME64x backplane is being used, SW4-4 can be used to enable Auto Slot
Identification.
SW4-5 will disable the PON_FSM micro-sequencer. The micro-sequencer
allows the power-up value of the CR/CSR registers to be automatically set-up