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DS20006554A 데이터시트(PDF) 68 Page - Microchip Technology |
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DS20006554A 데이터시트(HTML) 68 Page - Microchip Technology |
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68 / 94 page ![]() ZL30260-ZL30263 Data Sheet 68 © 2021 Microchip Technology Inc. DS20006554A Register Name: OCxDIFF Register Description: Output Clock x Start Stop Register Register Address: OC1: 202h, OC2: 212h, OC3: 222h, OC4: 232h, OC5: 242h OC6: 252h, OC7: 262h, OC8: 272h, OC9: 282h, OC10: 292h Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Name VCM[3:0] VOD[3:0] Default 0 0 0 0 0 1 0 1 Bits 7 to 4: Differential Common-Mode Voltage (VCM[3:0]). This field specifies the common-mode voltage for the differential output driver. See section 5.6.1. 0000 = 1.23V (default) – typical for LVDS and AC-coupled LVPECL 0011 = 1.0V 0100 = 1.1V 0101 = 1.3V 0110 = 1.4V 0111 = 1.5V 1000 = 1.6V 1001 = 1.7V 1010 = 1.8V 1011 = 1.9V 1100 = 2.0V – typical for DC-coupled LVPECL 1101 = 2.1V 1111 = Use this setting for HCSL signal format All other values reserved Bits 3 to 0: Differential Swing Voltage (VOD[3:0]). This field specifies the differential output voltage (VOD) for the differential output driver. In the device this field actually controls driver output current. When the specified current is driven into the required external 100 termination resistor, the voltage across the termination resistor is the desired VOD. See Figure 16 for the definition of VOD. VOD is equivalent to the single-ended voltage swing of the OCxP pin or the OCxN pin. This field is ignored and VOD is set to 400mV when OCxCR2.OCSF=0001 (LVDS). See section 5.6.1. 0000 = 300mV (3mA driver current) 0001 = 400mV – typical for LVDS 0010 = 500mV 0011 = 600mV 0100 = 700mV 0101 = 800mV – default value, typical for LVPECL 0110 = 900mV (9mA driver current) 1010 = Use this setting for HCSL signal format All other values reserved |
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