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UT84520 Datasheet(PDF) 2 Page - Unisonic Technologies |
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UT84520 Datasheet(HTML) 2 Page - Unisonic Technologies |
2 / 13 page UTC UT84520 CMOS IC UTC UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R502-004,A Pin Assignment X2 CLK OPT Z2 Y1 OSCR Y2 VDD OSC.OUT L M VSS R 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 DATA Z1 X1 Pin Descriptions Pin No Symbol I/O Function 1 Vdd P Power line 2 OSC.OUT O The RC oscillation clock output. Or 3mA sink current output for X, Y photo emitters 3 Z1 I 4 Z2 I Z-axis input. Photo mode: three steps dynamic input impedance. 5 CLK I/O Connect to 8042 auxiliary port CLK line in PS/2 mode. 6 DATA I/O Connect to 8042 auxiliary port DATA line in PS/2 mode. 7 OPT I Input: 200Kohm pull low to Vss. When Opt is connected to Vdd, UT84520 will enter test mode. In test mode, L will be the output of X1, while M will be the output of X1. Toggling R key can change these output to be Y1, Y2 or Z1, Z2 respectively. 8 Vss P Power line Gnd 9 R I 10 M I/O 11 L I/O Three key switches inputs. 200Kohm pull low. In Z-axis key mode, M key toggling can change the scrolling speed from low to high 12 X1 I 13 X2 I 14 Y1 I 15 Y2 I Three step dynamic input impedance. If OSC.OUT is not connected to LEDs, the dynamic input impedance will be off. 16 OSCR I Connect 50Kohm ± 5% for oscillation |
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