XVME-976 Adapter Module
4-
4-12
Flash 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 4-11. The programming volt-
age is then gated to the device with software, as part of the programming al-
gorithm.
Table 4-11. EPROM Programming Voltage
Program Voltage
Jumpering
W1, 6
W2, 7
W3, 8
W4, 9
5V
5V
12V
12V
12V
12V
1/2
1/2
1/2
1/2
1/2
1/2
5/6, 8/9
5/6, 6/9
2/3, 4/5, 6/9
2/3, 4/5, 6/9, 7/8
2/3, 4/5, 5/9, 7/8
2/3, 4/5, 6/9, 7/8
Open
Open
Open
Open
Open
Open
3/5, 4/6
3/5, 4/6
4/6
4/6
4/6
1/3, 4/6
If 12 volt Flash EPROMs are used, you will have to supply the 12 volt pro-
gramming voltage while programming the devices. This can come from the
PC bus, or an external power supply. To 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. After programming the devices, you can
remove the 12 volt supply, or the jumper from J3 1/2. Table 4-12 shows a
summary of connector J3.
Table 4-12. Connector (J3)
Function
Pin
From PC bus +12 volts
To Vpp (W2 and W7, pin 3)
Ground
1
2
3
Default is 1/2
Содержание XVME-976/202
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