IDT VersaClock 6E 5P49V6965, User Manual, Page: 3 / 10

3 ©2019 Integrated Device Technology, Inc. June 17, 2019
VersaClock
®
6E – 5P49V6965 and 5P49V6975 Programmer Board User Guide
Figure 3. JP14 and JP16 for I2C
Figure 4. JP14 and JP16 for SEL0/1
After programming multiple configurations, the 5P49V6965/6975 can be restarted in Hardware Select mode and then the SEL0 and SEL1
pins can be used to select a configuration. The SEL0/1 pins on the 5P49V6965/6975 have pull-down resistors on the chip so when
leaving the pins open, like
Figure 2 , both SEL0 and SEL1 are low and configuration 0 is selected. The upper pins in JP14 and JP16 are
pulled up to VDD so when placing jumpers as in Figure 4 , the SEL0 and SEL1 pins are pulled up. Placing the jumpers as in Figure 4
selects configuration 3. Also see the chapter about the Mode jumper to use the Hardware Select mode.
JP14 and JP16 also allow wiring of the I2C bus into a system. As mentioned above, the bottom pins connect to the FTDI USB-to-I2C
bridge. For SCL connect to the bottom pin of JP16, for SDA connect to the bottom pin of JP14 and for ground use the GND test point to
the right of JP14 and JP16. These three wires can be connected to a 5P49V6965/6975 that is assembled in a system so Timing
Commander can be used to control this remote 5P49V6965/6975.