
Pentek Model 6526 Operating Manual Page 31
Rev. A
2.4 Model 6526 Front Panel (continued)
2.4.3 TMS320C31 Serial Port
The ‘C31 DSP processor features a serial port, whose pins are brought directly
to a front panel 20−pin connector. The signal description is found in the Texas
Instruments TMS320C3x User’s Guide, TI publication number 2558539−9761.
Note that these pins are UNBUFFERED
connections to the ‘C31. Please exer−
cise extreme caution when making connections to this header.
The Serial Port is available on the front panel via a 20−pin male, dual−in−line
(DIL) shrouded connector. The connector is type 3M 2520−5002−UB. It con−
sists of two rows of 10 pins on a grid of 0.100 inch. The connector mates with
any standard DIL female socket mass−termination connector using 0.050" flat
ribbon cable, such as 3M part # 3421−6020, with strain relief (Pentek part #
353−02006). The recommended flat ribbon cable is 3M part # 3365/20 (Pentek
part # 378.62000) or an equivalent. Table 2−5, below, gives the pinout of this
connector.
2.4.4 Reset Button
The Model 6526’s Reset button is located between the Digital Data Input con−
nector and the Sync bus connector on the front panel. Pressing this switch
returns the Model 6526 to its power−up reset state.
Table 2−5: Front Panel Serial Port Connector
Pin # Signal Pin # Signal
20 GND 19 TCLK1
18 GND 17 TCLK0
16 GND 15 XF1
14 GND 13 XF0
12 GND 11 FSX0
10 GND 9 DX0
8 GND 7 CLKX0
6 GND 5 FSR0
4 GND 3 DR0
2 GND 1 CLKR0
Mating connector: 3M part # 3421−6020 or eq.
Recommended flat ribbon cable: 3M part # 3365/20 or eq.
19
17
15
13
11
9
7
5
3
1
20
18
16
14
12
10
8
6
4
2
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