CS2200-OTP

14

DS842F1

5.5

Auxiliary Output

The auxiliary output pin (AUX_OUT) can be mapped, as shown in Figure 8, to one of three signals: refer-

ence clock (RefClk), additional PLL clock output (CLK_OUT), or a PLL lock indicator (Lock). The mux is con-

trolled via the AuxOutSrc[1:0] modal parameter. If AUX_OUT is set to Lock, the AuxLockCfg global

parameter is then used to control the output driver type and polarity of the LOCK signal (see section 6.3.1

on page 18). If AUX_OUT is set to CLK_OUT, the phase of the PLL Clock Output signal on AUX_OUT may

differ from the CLK_OUT pin. The driver for the pin can be set to high-impedance using the M2 pin when

the M2Config[1:0] global parameter is set to either 001 or 010.

Figure 8. Auxiliary Output Selection

5.6

Mode Pin Functionality

5.6.1

M1 and M0 Mode Pin Functionality

M[1:0] determine the functional mode of the device and select both the default User Defined Ratio and

the set of modal parameters. The modal parameters are RModSel[1:0] and AuxOutSrc[1:0]. By modifying

one or more of the modal parameters between the 4 sets, different functional configurations can be

achieved. However, global parameters are fixed and the same value will be applied to each functional

configuration. Figure 10 on page 17 provides a summary of all parameters used by the device.

Referenced Control

Parameter Definition

AuxOutSrc[1:0]...................... “Auxiliary Output Source Selection (AuxOutSrc[1:0])” on page 18

AuxOutDis .............................“M2 Configured as Output Disable” on page 15

AuxLockCfg........................... “AUX PLL Lock Output Configuration (AuxLockCfg)” section on page 18

M2Config[2:0]........................“M2 Pin Configuration (M2Config[2:0])” on page 19

3:1 Mux

Auxiliary Output Pin

(AUX_OUT)

AuxOutDis

AuxOutSrc[1:0]

AuxLockCfg

Timing Reference Clock

(RefClk)

PLL Clock Output

(PLLClkOut)

PLL Lock/Unlock Indication

(Lock)