Xycom XVME-956 Series Manual page 81

Chapter 5 - Memory Expansion Module (XVME-956/101)
5.4.3.3 F l a s h EPROM Programming Voltage
If 5 volt Flash EPROMs are used, you can connect the programming voltage by jumpering W2 or W7
as indicated in Table 5-11. T h e programming voltage is then gated to the device with software, as part
of the programming algorithm.
PROGRAM
VOLTAGE
5V
5V
12V
12V
12V
12V
If 12 volt Flash EPROMs are used, you will have to supply the 12 volt programming voltage while
programming the devices. This can come from the PC bus, or an external power supply. T o use the
PC bus voltage, connect J3, pins 1 and 2. To use an external power supply, connect the 12 volts to J3,
pin 2, with the return to J3, pin 3. A f t e r programming the devices, you can remove the 12 volt supply,
or the jumper from J3 1/2. Table 5-12 shows a summary of connector J3.
5-12
Table 5-11. EPROM Programming Voltage
Wl, 6 W2, 7
1/2 5/6, 8/9
1/2 5/8, 6/9
1/2
2/3, 4/5, 6/9
1/2
2/3, 4/5, 6/9, 7/8
1/2
2/3, 4/5, 6/9, 7/8
1/2
2/3, 4/5, 6/9, 7/8
Table 5-12. Summary of Connector (J3)
FUNCTION
From PC bus +12 volts
To Vpp (W2 and W7, pin 3)
Ground
Default is 1/2
JUMPERING
W3, 8
Open
Open
Open
Open
Open
Open
PIN
1
2
3
W4, 9
3/5, 4/6
3/5, 4/6
4/6
4/6
4/6
1/3, 4/6
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