HT1622 Holtek, HT1622 Datasheet
HT1622
Specifications of HT1622
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HT1622 Summary of contents
Page 1
... Time base or WDT overflow output Built-in LCD display RAM General Description HT1622 is a peripheral device specially designed for I/O type MCU used to expand the display capability. The max. display segment of the device are 256 patterns (32 8). It also supports serial interface, buzzer sound, Watchdog Timer or time base timer functions ...
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... Pin Assignment Rev. 1.70 2 HT1622 May 21, 2008 ...
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... Pad Assignment * The IC substrate should be connected to VDD in the PCB layout artwork. Rev. 1.70 2 Chip size (mil) Bump height Min. Bump spacing: 23.102 m 2 Bump size HT1622 May 21, 2008 ...
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... Description Chip selection input with Pull-high resistor. When the CS is logic high, the data and command read from or written to the HT1622 are disabled. The se- rial interface circuit is also reset. But logic low level and is input to the CS pad, the data and command transmission between the host controller and the HT1622 are all enabled ...
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... OL V =0. =2. =4. =0. =0. =2. =4. =0. =0. =2. =4. DATA, WR, CS HT1622 Ta=25 C Typ. Max. Unit 2.7 5 210 A 135 415 0 1.0 V 2.4 3.0 V 4.0 5.0 V 0.9 1.8 mA 1.7 3.0 mA 1.8 0 3.0 1.7 200 ...
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... Duty cycle 50 500 Write mode 3.34 3V Read mode 6.67 Write mode 1.67 5V Read mode 3.34 60 500 500 50 On-chip RC oscillator 1.5 On-chip RC oscillator 3 Figure 2 6 HT1622 Ta=25 C Typ. Max. Unit 32 40 kHz 32768 n/f sec LCD 150 kHz 300 kHz 75 kHz 150 kHz 600 ns 125 ...
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... Buzzer Tone Output A simple tone generator is implemented in the HT1622. The tone generator can output a pair of differential driv- ing signals on the BZ and BZ which are used to generate a single tone. ...
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... Command Format The HT1622 can be configured by the software setting. There are two mode commands to configure the HT1622 resource and to transfer the LCD display data. The following are the data mode ID and the command mode ID: Operation Mode READ Data WRITE Data READ-MODIFY-WRITE ...
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... WRITE Mode (Command Code : WRITE Mode (Successive Address Writing) READ-MODIFY-WRITE Mode (Command Code : READ-MODIFY-WRITE Mode (Successive Address Accessing) Rev. 1.70 9 HT1622 May 21, 2008 ...
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... Command Mode (Command Code : Mode (Data and Command Mode) Rev. 1.70 10 HT1622 May 21, 2008 ...
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... Clear the contents of WDT stage C System clock source, on-chip RC oscillator C System clock source, external clock source C Tone frequency output: 4kHz C Tone frequency output: 2kHz C Disable IRQ output C Enable IRQ output 11 HT1622 Function Def. Yes Yes Yes Yes Yes Yes Yes May 21, 2008 ...
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... RC oscillator or an external 32kHz clock. Calculation of the frequency is based on the sys- tem frequency sources as stated above recommended that the host controller should initialize the HT1622 after power on reset, for power on reset may fail, which in turn leads to the malfunctioning of the HT1622. Rev. 1.70 ...
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... Package Information 44-pin QFP (10´10) Outline Dimensions Symbol Rev. 1.70 Dimensions in mm Min. Nom. 13 9.9 13 9.9 0.8 0.3 1.9 0.25 0.73 0.1 0 HT1622 Max. 13.4 10.1 13.4 10.1 2.2 2.7 0.5 0.93 0.2 7 May 21, 2008 ...
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... QFP (14´14) Outline Dimensions Symbol Rev. 1.70 Dimensions in mm Min. Nom. 17.3 13.9 17.3 13.9 1 0.4 2.5 0.1 0.73 0 HT1622 Max. 17.5 14.1 17.5 14.1 3.1 3.4 1.03 0.2 7 May 21, 2008 ...
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... LQFP (7´7) Outline Dimensions Symbol Rev. 1.70 Dimensions in mm Min. Nom. 8.9 6.9 8.9 6.9 0.4 0.13 1.35 0.05 0.45 0. HT1622 Max. 9.1 7.1 9.1 7.1 0.23 1.45 1.6 0.15 0.75 0.20 7 May 21, 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. 1.70 16 HT1622 May 21, 2008 ...