hd66789 Renesas Electronics Corporation., hd66789 Datasheet - Page 151

• Manufacturer Part Number: hd66789
• Description: 528-channel, One-chip Driver For Amorphous Tft Panels With 262,144-color Display Ram, Power Supply Circuit, And Gate Circuit
• Manufacturer: Renesas Electronics Corporation.

HD66789
External Resistance Value and R-C Oscillation Frequency (Referential Data)
11. Applies to the internal oscillator operations using external oscillation resistor Rf (figure and table).
Rev.0.12, May 09 2003, page 151 of 156
70
60
50
40
30
20
10
Resistance
External
150 k:
180 k:
200 k:
240 k:
270 k:
300 k:
390 k:
430 k:
Load Capacity C(pF)
110 k:
10
T.B.D.
(Rf)
Reference data
Rf
20
OSC1
OSC2
T.B.D.
Vcc = 1.8
V
299
234
202
186
160
145
132
106
97
T.B.D.
30
Vcc =3V, VLCD = 5.5V, VDH = 5.0V,
R-C Oscillation; fosc = 270kHz (240line),
Ta = 25 Centigrade, REV = "0", SAP ="001",
VRN4-0 = "0", VRP4-0 = "0",
PKP52-00 = "0", PRP12-00 ="0",
PKN52-00 = "0", PRN12-00 ="0",
All pins chnge at the same time from same grayscale.
The time till output level reaches +/-35mV when VCOM polarity changes.
Load resistance R = 10kΩ/pin
Vcc = 2 V
333
258
222
203
173
157
143
113
104
The oscillation frequency may vary
depending on the capacitors for OSC1, OSC2 pins.
Place OSC1 and OSC2 close to each other.
R-C Oscillation Frequency: fosc
Vcc = 2.4 V
372
284
243
222
188
169
153
121
110
Vcc = 3 V
401
305
258
235
198
177
161
126
115
Vcc = 3.3 V
411
311
263
240
202
181
163
128
116
Preliminary