HT1621 Holtek, HT1621 Datasheet
HT1621
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HT1621 Summary of contents
Page 1
... LCD driver General Description The HT1621 is a 128 pattern (32 4), memory mapping, and multi-function LCD driver. The S/W configuration feature of the HT1621 makes it suitable for multiple LCD applications including LCD modules and display sub- Selection Table HT162X HT1620 ...
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... Block Diagram Note: CS: Chip selection BZ, BZ: Tone outputs WR, RD, DATA: Serial interface COM0~COM3, SEG0~SEG31: LCD outputs IRQ: Time base or WDT overflow output Pin Assignment Rev. 2.00 2 HT1621 April 17, 2008 ...
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... Pad Assignment * The IC substrate should be connected to VDD in the PCB layout artwork. Rev. 2.00 2 Chip size (mil) Bump height Min. Bump spacing: 23. Bump size HT1621 April 17, 2008 ...
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... HT1621 are all enabled. READ clock input with pull-high resistor Data in the RAM of the HT1621 are clocked out on the falling edge of the RD signal. The clocked out data will appear on the DATA line. The host control- ler can use the next rising edge to latch the clocked out data ...
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... V =2. =4.5V 5V 120 =0. =0.5V 5V 120 =2. =4. DATA, WR, CS HT1621 125 Ta=25 C Typ. Max. Unit 5.2 V 150 300 A 300 600 A 60 120 A 120 240 A 100 200 A 200 400 A 0 ...
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... Duty cycle 50 Duty cycle 50% 5V 1.5 3V On-chip RC oscillator 3.0 CS 250 Write mode 3.34 3V Read mode 6.67 Write mode 1.67 5V Read mode 3.34 60 250 500 50 6 HT1621 Ta=25 C Typ. Max. Unit 256 320 kHz 32768 Hz 256 kHz f /1024 Hz SYS1 f /128 Hz SYS2 f /1024 Hz SYS3 n/f s LCD 150 kHz ...
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... OSCI pin. In this case, the sys- tem fails to enter the power down mode, similar to the case in the external 256kHz clock source operation. At the initial system power on, the HT1621 is at the SYS DIS state. Time Base and Watchdog Timer (WDT) ...
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... BZ and the BZ outputs will remain at low level. LCD Driver The HT1621 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 configuration. This feature makes the HT1621 suitable for multiply LCD applica- tions ...
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... HT1621. The CS line is used to initialize the serial inter- face circuit and to terminate the communication between the host controller and the HT1621. If the CS pin is set to 1, the data and command issued between the host controller and the HT1621 are first disabled and then initialized. Be- ...
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... READ Mode (Successive Address Reading) WRITE Mode (Command Code : WRITE Mode (Successive Address Writing) Read-Modify-Write Mode (Command Code : Rev. 2.00 10 HT1621 April 17, 2008 ...
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... Command Mode (Command Code : Mode (Data and Command Mode) Note recommended that the host controller should read in the data from the DATA line between the rising edge of the RD line and the falling edge of the next RD line. Rev. 2.00 11 HT1621 April 17, 2008 ...
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... Application Circuits Host Controller with an HT1621 Display System Note: The connection of IRQ and RD pin can be selected depending on the requirement of the MCU. The voltage applied to V pin must be lower than V LCD Adjust VR to fit LCD display Adjust R (external pull-high resistance) to fit user s time base clock. ...
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... RC oscillator, a 32.768kHz crystal oscillator external 256kHz clock. Calculation of the frequency is based on the system frequency sources as stated above recommended that the host control- ler should initialize the HT1621 after power on reset, for power on reset may fail, which in turn leads to the mal- functioning of the HT1621. ...
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... Package Information 28-pin SKDIP (300mil) Outline Dimensions Symbol Rev. 2.00 Dimensions in mil Min. Nom. 1375 278 125 125 16 50 100 295 330 0 14 HT1621 Max. 1395 298 135 145 20 70 315 375 15 April 17, 2008 ...
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... QFP (10´10) Outline Dimensions Symbol Rev. 2.00 Dimensions in mm Min. Nom. 13 9.9 13 9.9 0.8 0.3 1.9 0.25 0.73 0.1 0 HT1621 Max. 13.4 10.1 13.4 10.1 2.2 2.7 0.5 0.93 0.2 7 April 17, 2008 ...
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... SSOP (300mil) Outline Dimensions Symbol Rev. 2.00 Dimensions in mil Min. Nom. 395 291 8 613 HT1621 Max. 420 299 12 637 April 17, 2008 ...
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... LQFP (7´7) Outline Dimensions Symbol Rev. 2.00 Dimensions in mm Min. Nom. 8.90 6.90 8.90 6.90 0.50 0.20 1.35 0.10 0.45 0. HT1621 Max. 9.10 7.10 9.10 7.10 1.45 1.60 0.75 0.20 7 April 17, 2008 ...
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... Product Tape and Reel Specifications Reel Dimensions SSOP 48W Symbol Description A Reel Outer Diameter B Reel Inner Diameter C Spindle Hole Diameter D Key Slit Width T1 Space Between Flange T2 Reel Thickness Rev. 2.00 Dimensions in mm 330 1.0 100 0.1 13.0+0.5 0.2 2.0 0.5 32.2+0.3 0.2 38.2 0.2 18 HT1621 April 17, 2008 ...
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... Carrier Tape Width P Cavity Pitch E Perforation Position F Cavity to Perforation (Width Direction) D Perforation Diameter D1 Cavity Hole Diameter P0 Perforation Pitch P1 Cavity to Perforation (Length Direction) A0 Cavity Length B0 Cavity Width K1 Cavity Depth K2 Cavity Depth t Carrier Tape Thickness C Cover Tape Width Rev. 2.00 Dimensions in mm 32.0 0.3 16.0 0.1 1.75 0.1 14.2 0.1 2.0 Min. 1.5+0.25 4.0 0.1 2.0 0.1 12.0 0.1 16.20 0.1 2.4 0.1 3.2 0.1 0.35 0.05 25.5 19 HT1621 April 17, 2008 ...
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... Holtek s products are not authorized for use as critical components in life support devices or systems. 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. Rev. 2.00 20 HT1621 April 17, 2008 ...