HD66766R Datasheet, PDF (87/97 Pages) Hitachi Semiconductor – 132 x 176-dot Graphics LCD Controller/Driver for 65K Colors

HD66766R
Rev. 1.0-1 / September 2002
6. This excludes the current flowing through the input/output units. The input level must be fixed high
or low because through current increases if the CMOS input is left floating. Even if the CS pin is low
or high when an access with the interface pin is not performed, current consumption does not change.
7. Applies to the external clock input (figure ).
Oscillator
2kΩ
Open
OSC1
OSC2
0.7Vcc
0.5Vcc
0.3Vcc
Th
Tl
Duty =
Th
Th+ Tl
x 100%
trcp
t _fcp
Figure 67 External Clock Supply
8. Applies to the internal oscillator operations using external oscillation resistor Rf (figure and table).
9. Set VCI2 to maintain the relation VCI2 =< VOUT-0.5V.
OSC1
Rf
Since the oscillation frequency varies depending on the OSC1 and OSC2 pin
OSC2
capacitance, the wiring length to these pins should be minimized.
Figure 68 Internal Oscillation
External
Resistance
(Rf)
75 kΩ
130 kΩ
180 kΩ
200 kΩ
240 kΩ
280 kΩ
360 kΩ
470 kΩ
R-C Oscillation Frequency: fosc
Vcc = 1.8V
364
263
210
193
174
156
129
102
Vcc = 2.2 V
495
345
270
245
218
194
158
122
Vcc = 2.4 V
559
381
295
266
236
210
170
129
Vcc = 3.0 V
631
421
323
290
256
226
182
137
Vcc = 3.6 V
687
453
344
307
270
238
191
142
Table 56 External Resistance Value and R-C Oscillation Frequency (Referential Data)
87