HT1620 Holtek Semiconductor Inc, HT1620 Datasheet
HT1620
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HT1620 Summary of contents
Page 1
... LCD driver. The S/W configuration feature of the HT1620 makes it suitable for multiple LCD applica- tions including LCD modules and display sub- systems. Only three or four lines are required Selection Table HT162X HT1620 HT1621 HT1622 HT16220 HT1623 HT1625 HT1626 HT1627 HT16270 COM SEG 32 ...
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... WR, RD, DATA: Serial interface COM0~COM3, SEG0~SEG31: LCD outputs IRQ: Time base or WDT overflow output VO15N: Half voltage circuit output pin VEE: Double voltage circuit output pin CC1/CC2: External capacitor pin, for double voltage and half voltage circuit use 2 HT1620 July 26, 1999 ...
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... Pin Assignment 3 HT1620 July 26, 1999 ...
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... Pad Assignment Chip size: 142 ´ 141 (mil) * The IC substrate should be connected to VDD in the PCB layout artwork HT1620 July 26, 1999 ...
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... Pad Coordinates Pad No Pad No. 1 -61.58 63.62 2 -61.83 50.83 3 -61.83 43.73 4 -61.83 37.10 5 -61.83 30.47 6 -61.83 23.84 7 -61.83 17.21 8 -61.83 10.58 9 -61.83 3.95 10 -61.83 -2.68 11 -61.83 -9.31 12 -61.83 -15.94 13 -61.83 -22.57 14 -60.90 -64.26 15 -54.27 -64.26 16 -47.64 -64.26 17 -41.01 -64.26 18 -34.38 -64.26 19 -27.75 -64.26 20 -21.12 -64.26 21 -14.49 -64.26 22 -7.86 -64.26 23 -1.23 -64.26 24 5.40 -64.26 25 12.03 -64.26 26 18.66 -64.26 Unit: mil 25.29 -64.26 28 66.98 -62.65 29 66.98 -56.01 30 66.98 -49.38 31 66.98 -42.76 32 66.98 -36.13 33 66.98 -29.50 34 66.98 -22.86 35 66.98 -16.24 36 66.98 -9.60 37 66.98 -2.97 38 66.98 3.65 39 66.98 10.28 40 65.71 64.39 41 59.08 64.39 42 52.45 64.39 43 40.59 64.39 44 29.75 64.39 45 22.95 64.39 46 16.32 64.39 47 9.56 64.39 48 -2.21 64.30 49 -21.80 64.39 50 -39.52 64.39 51 -49.60 63.62 5 HT1620 July 26, 1999 ...
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... DATA line. The host controller can use the next raising edge to latch the clocked out data. WRITE clock input with pull-high resistor Data on the DATA line are latched into the HT1620 on the rising edge of the WR signal. 43 DATA I/O Serial data input/output with pull-high resistor ...
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... Conditions DD 3V Crystal 32kHz ¾ ¾ ¾ ¾ ¾ Crystal 32kHz ¾ ¾ ¾ ¾ n: Number of COM ¾ ¾ Write mode ¾ 3V Read mode ¾ ¾ ¾ ¾ 7 HT1620 Ta=25°C Typ. Max. Unit 3.3 V ¾ ¾ ¾ 0.6 V ¾ 3.0 V 1.6 ¾ mA -1.2 ¾ ...
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... Typ. Max. Unit V Conditions DD ¾ CS ¾ 250 Write mode 3.34 ¾ 3V Read mode 6.67 ¾ 3V ¾ ¾ 120 3V ¾ ¾ 120 3V ¾ ¾ 120 3V ¾ ¾ 100 3V ¾ ¾ 100 Figure 2 8 HT1620 ¾ ns ¾ ms ¾ ¾ ns ¾ ns ¾ ns ¾ ns ¾ ns July 26, 1999 ...
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... HT1620. The tone generator can output a pair of differential driving signals on the BZ and BZ which are used to generate a single tone. LCD driver The HT1620 is a 128 (32´4) pattern LCD driver. It can be configured as 1/2 or 1/3 bias and commons of LCD driver by the S/W configu- ration. This feature makes the HT1620 suitable for multiple LCD applications ...
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... HT1620. The CS line is used to initialize the serial interface circuit and to terminate the com- munication between the host controller and the HT1620. If the CS pin is set to 1, the data and command issued between the host controller and the HT1620 are first disabled and then initial- ized ...
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... Timing Diagrams READ mode (command code READ mode (successive address reading) WRITE mode (command code HT1620 July 26, 1999 ...
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... Note recommended that the host controller should read with the data from the DATA line between the raising edge of the RD line and the falling edge of the next RD line. READ-MODIFY-WRITE mode (command code READ-MODIFY-WRITE mode (successive address accessing) 12 HT1620 July 26, 1999 ...
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... Command mode (command code Mode (data and command mode) 13 HT1620 July 26, 1999 ...
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... Application Circuits m * Notes: The connection of the IRQ and RD pin is selectable depending on the requirement of the mC. V =2.4V~3.3V, V =-1 Adjust R (external pull-high resistance) to fit user¢s time base clock (LCD voltage)=V -V =3/2 V LCD HT1620 =3.6V~4.9V. DD July 26, 1999 ...
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... LCD 1/2 bias option ab=00: 2 commons option C ab=01: 3 commons option ab=10: 4 commons option LCD 1/3 bias option ab=00: 2 commons option C ab=01: 3 commons option ab=10: 4 commons option C Tone frequency, 4kHz C Tone frequency, 2kHz C Disable IRQ output C Enable IRQ output 15 HT1620 Def. Yes Yes Yes Yes Yes Yes July 26, 1999 ...
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... Calculation of the frequency is based on the system frequency sources as stated above recommended that the host controller should ini- tialize the HT1620 after power on reset, for power on reset may fail, which in turn leads to malfunc- tioning of the HT1620. ...
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... Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. 17 HT1620 July 26, 1999 ...