ASAHI KASEI
[AK4117]
Clock Source
The following circuits are available to feed a clock into the XTI pin of AK4117.
1) X’tal mode
The X’tal with proper value should be connected between XTI and XTO pins.
XTI
AK4117
XTO
Figure 8. X’tal mode (EXCK= “0”)
Note: External capacitance depends on the crystal oscillator (Typ.10-40pF).
2) External clock mode
EXCK bit should be set to “1” and the proper frequency clock input into the XTI pin. XTO pin should be left open.
XTI
External Clock
AK4117
XTO
Figure 9. External clock mode (EXCK= “1”)
3) OFF mode
CM1-0 bits should be set to “00” and XTL1-0 bits to “11” respectively. XTI and XTO pins should be left open. The
XTI pin can also be connected to ground externally.
XTI
AK4117
XTO
Figure 10. OFF mode (CM1-0= “00”, XTL1-0= “11”)
MS0157-E-03
2004/04
- 12 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
