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Most pins of B2B connectors JM4 and JM5 are general-purpose, user-defined I/O pins (GPIOs). There are, however, up to 9 different functional types of pins on the TE0320, as outlined in Table 39. In pin-out tables 40 and 41, the individual pins are colour-coded according to pin type as in Table 39.
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type | description |
I/O | Unrestricted, general-purpose user-I/O pin. Most pins can be paired together to form differential I/Os. |
Dual-purpose pin used in some configuration modes during the configuration process and then usually available as a user I/O after configuration. If the pin is not used during configuration, this pin behaves as an I/O-type pin. See Xilinx UG332: Spartan-3 Generation Configuration User Guide for additional information on these signals. | |
color in color in {color:red}look ma, red text!{color} | VREF0 provides a reference voltage input for certain I/O standards. See paragraph 6.9 Voltage Reference VREF0 for additional information on this signal. |
| Either a user-I/O pin or an input to a specific clock buffer driver. Packages have 16 global clock inputs that optionally clock the entire device. See the Using Global Clock Resources chapter in UG331: Spartan-3 Generation FPGA User Guide for additional information on these signals. |
| Dedicated configuration pin, two per device. Not available as a user-I/O pin. Every package has two dedicated configuration pins. These pins are powered by VCCAUX. See Xilinx UG332: Spartan-3 Generation Configuration User Guide for additional information on these signals. |
| Control and status pins for the power-saving Suspend mode. SUSPEND is a dedicated pin and is powered by VCCAUX. AWAKE is a Dual-Purpose pin. Unless Suspend mode is enabled in the application, AWAKE is available as a user-I/O pin. |
Dedicated JTAG pin - 4 per device. Not available as a user-I/O pin. Every package has four dedicated JTAG pins. These pins are powered by VCCAUX. | |
Dedicated ground pin. All must be connected. | |
TE | Trenz Electronic specific pin type. See the description of each pin in the user manual for additional information on the corresponding signals. |
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