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____________________________________________________________________________________________ DS3102 Rev: 102808 13 of 141 6. Pin Descriptions Table 6-1. Input Clock Pin Descriptions PIN NAME TYPE PIN DESCRIPTION REFCLK I Reference Clock. Connect to a 12.800MHz, high-accuracy, high-stability, low-noise local oscillator (TCXO, OCXO, or XO). See Section 7.3. IC1POS, IC1NEG IDIFF Input Clock 1. LVDS/LVPECL or CMOS/TTL. Programmable frequency (default 8kHz). CMOS/TTL: Bias IC1NEG to 1.4V and connect the single-ended signal to IC1POS. IC2POS, IC2NEG IDIFF Input Clock 2. LVDS/LVPECL or CMOS/TTL. Programmable frequency (default 8kHz). CMOS/TTL: Bias IC2NEG to 1.4V and connect the single-ended signal to IC2POS. This input can be associated with the SYNC3 pin. IC3 IPD Input Clock 3. CMOS/TTL. Programmable frequency (default 8kHz). This input can be associated with the SYNC1 pin. IC4 IPD Input Clock 4. CMOS/TTL. Programmable frequency (default 8kHz). This input can be associated with the SYNC2 pin. IC5POS, IC5NEG IDIFF Input Clock 5. LVDS/LVPECL or CMOS/TTL. Programmable frequency (default 19.44MHz). CMOS/TTL: Bias IC5NEG to 1.4V and connect the single-ended signal to IC5POS. This input can be associated with the SYNC1 pin. IC6POS, IC6NEG IDIFF Input Clock 6. LVDS/LVPECL or CMOS/TTL. Programmable frequency (default 19.44MHz). CMOS/TTL: Bias IC6NEG to 1.4V and connect the single-ended signal to IC6POS. This input can be associated with the SYNC2 pin. IC8 IPD Input Clock 8. CMOS/TTL. Programmable input reference (default 19.44MHz). IC9 IPD Input Clock 9. CMOS/TTL. Programmable frequency (default 19.44MHz). This input can be associated with the SYNC3 pin. SYNC1 IPD Frame-Sync 1 Input. 2kHz, 4kHz, or 8kHz. FSCR3:SOURCE ! = 11XX. This pin is the external frame-sync input associated with any input pin using the FSCR3:SOURCE field. FSCR3:SOURCE = 11XX. This pin is the external frame-sync signal associated with IC3 or IC5, depending on which one is currently selected and the setting of FSCR1.SYNCSRC[1:0]. SYNC2 IPD Frame-Sync 2 Input. 2kHz, 4kHz, or 8kHz. FSCR3:SOURCE ! = 11XX. This pin is not used for the external frame-sync signal. FSCR3:SOURCE = 11XX. This pin is the external frame-sync signal associated with IC4 or IC6, depending on which one is currently selected and the setting of FSCR1.SYNCSRC[1:0]. SYNC3 IPU Frame-Sync 3 Input. 2kHz, 4kHz, or 8kHz. FSCR3:SOURCE ! = 11XX. This pin is not used for the external frame-sync signal. FSCR3:SOURCE = 11XX. This pin is the external frame-sync signal associated with IC9 or IC2, depending on which one is currently selected and the setting of FSCR1.SYNCSRC[1:0]. |
