UPD63210GT 데이터 시트보기 (PDF) - NEC => Renesas Technology
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UPD63210GT Datasheet PDF : 18 Pages
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µPD63210, 63210L
3. OPERATION
3.1 Operation Clock
(1) Selection of system clocks
System clocks are selected by the CKSEL (No.6) pin.
Table 3-1. Selection of System Clocks
System Clock
384fs
512fs
CKSEL
L
H
(2) Generation of operation clock
The clock required for internal operation can be generated by configuring a crystal oscillator circuit as shown
in Figure 3-1.
Figure 3-1. Crystal Oscillator Circuit Configuration
To dynamic generator
MCKO
XTO
XTI
970 kΩ
Crystal
20 to 30 pF
As in Figure 3-2, the clock can also be generated by supplying a system clock from outside to the XTI (No.4)
pin. The system clock waveform at this time must satisfy the conditions in the electrical specifications (such as
VIH, VIL under DC characteristics; and tMCK, tMWHM, tMWL under AC characteristics).
Figure 3-2. Configuration When Providing System Clock Externally
To dynamic generator
MCKO
XTO
XTI
(No connection required)
External system clock input
8
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