HT46RU66 Holtek Semiconductor Inc., HT46RU66 Datasheet - Page 46
HT46RU66
Manufacturer Part Number
HT46RU66
Description
Ht46ru66/ht46cu66 -- A/d Type 8-bit Mcu With Lcd
Manufacturer
Holtek Semiconductor Inc.
Datasheet
1.HT46RU66.pdf
(63 pages)
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Application Circuits
Note: 1. Crystal/resonator system oscillators
Rev. 1.20
2. Reset circuit
3. For applications where noise may interfere with the reset circuit and for details on the oscillator external com-
For crystal oscillators, C1 and C2 are only required for some crystal frequencies to ensure oscillation. For
resonator applications C1 and C2 are normally required for oscillation to occur. For most applications it is not
necessary to add R1. However if the LVR function is disabled, and if it is required to stop the oscillator when
VDD falls below its operating range, it is recommended that R1 is added. The values of C1 and C2 should be
selected in consultation with the crystal/resonator manufacturer specifications.
The reset circuit resistance and capacitance values should be chosen to ensure that VDD is stable and re-
mains within its operating voltage range before the RES pin reaches a high level. Ensure that the length of
the wiring connected to the RES pin is kept as short as possible, to avoid noise interference.
ponents, refer to Application Note HA0075E for more information.
46
HT46RU66/HT46CU66
October 2, 2007
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