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HT95L00P 数据表(PDF) 28 Page - Holtek Semiconductor Inc |
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HT95L00P 数据表(HTML) 28 Page - Holtek Semiconductor Inc |
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28 / 52 page  HT95LXXX Rev. 1.20 28 May 26, 2004 LCD Driver The LCD driver can directly drive an LCD panel with 1/8 duty and 1/4 bias or with 1/16 duty and 1/5 bias, this function is selected by the flag VBIAS. The frame of this LCD driver may select a 64Hz or 128Hz by flag FRAME. LCD driver uses the voltage of the VLCD pin as the power source. To adjust the view angle, the programmer can select the real LCD power by the flags VCON0 and VCON1. The flag LCDON is used to turn On/Off the LCD display. Note that the VLCD voltage must equal or be less than VDD. Segment/Common to I/O Selection For the flexible purpose, some of the LCD COMMON and SEGMENT pins are shared with the input/output port. Both of the HT95L400/40P and HT95L300/30P provide 12 pins to be selected to SEGMENT output pins or I/O pins. HT95L200/20P provides 8 pins to be selected for COMMON output pins or I/O pins. Both of the HT95L100/10P and HT95L000/00P provide 4 pins to be selected for SEGMENT output pins or I/O pins. All of the HT95L400/40P, HT95L300/30P and HT95L200/20P provide the LCD COMMON output pins for 8 COMMON or 16 COMMON. The description of the relation between segment pins, common pins and I/O pins are shown on the below. Register Label Bits R/W Function LCDC (2DH) FRAME 0 RW Supported for HT95L400/40P, HT95L300/30P, HT95L200/20P, HT95L100/10P LCD frame selection 0: LCD frame is 64Hz 1: LCD frame is 128Hz The frame frequency is fixed to 64Hz for HT95L100/10P and HT95L000/00P VBIAS 1 RW Supported for HT95L400/40P, HT95L300/30P, HT95L200/20P LCD BIAS selection 0: select 1/16 duty and 1/5 bias, COM15~COM0 are available 1: select 1/8 duty and 1/4 bias, only COM15~COM8 are available When the 8 COM is selected HT95L400/40P: COM7~COM0 will be optioned to unused pins HT95L300/30P: COM7~COM0 will be optioned to unused pins HT95L200/20P: COM7~COM0 are disabled, PD7~PD0 are available LBEN 2 RW Supported for HT95L400/40P, HT95L300/30P, HT95L200/20P, HT95L100/10P Low battery detection switch 0: disable the low battery detection 1: enable the low battery detection ¾ 3 RO Unused bit, read as ²0² LBFG 4 ROS Supported for HT95L400/40P, HT95L300/30P, HT95L200/20P, HT95L100/10P Low battery detection flag 1: LBIN pin voltage is less than 1.15V 0: LBIN pin voltage is not less than 1.15V VCON0 VCON1 5 6 RW LCD contrast adjusting Bit6,5=00: LCD voltage supply is 0.66 ´VLCD Bit6,5=10: LCD voltage supply is 0.82 ´VLCD Bit6,5=01: LCD voltage supply is 0.93 ´VLCD Bit6,5=11: LCD voltage supply is 1.00 ´VLCD LCDON 7 RW 1: Turn on the LCD display 0: Turn off the LCD display |
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