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  • 38D5 Group and 38C5 Group Note on Voltage Multiplier Start :38d5组和电压倍增器38c.

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    内容提示: To our customers, Old Company Name in Catalogs and Other Documents On April 1st, 201 0, NEC Electronics Corporation merged with Renesas Technology Corporation, and Renesas Electronics Corporation took over all the business of both companies. Therefore, although the old company name remains in this document, it is a valid Renesas Electronics document. We appreciate your understanding. Renesas Electronics website: http://www.renesas.com April 1st, 201 0 Renesas Electronics Corporation Issued by:...

    亚博足球app下载格式:PDF| 浏览次数:1| 上传日期:2015-03-14 13:33:10| 亚博足球app下载星级:
    To our customers, Old Company Name in Catalogs and Other Documents On April 1st, 201 0, NEC Electronics Corporation merged with Renesas Technology Corporation, and Renesas Electronics Corporation took over all the business of both companies. Therefore, although the old company name remains in this document, it is a valid Renesas Electronics document. We appreciate your understanding. Renesas Electronics website: http://www.renesas.com April 1st, 201 0 Renesas Electronics Corporation Issued by: Renesas Electronics Corporation (http://www.renesas.com) Send any inquiries to http://www.renesas.com/inquiry. (c) 2009. Renesas Technology Corp., All rights reserved. Page 1 of 2 Date: Dec. 08, 2009RENESAS TECHNICAL UPDATE Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 1 00-0004, Japan Renesas Technology Corp. Product Category MPU/MCU Document No. TN-380-A068A/E Rev.1 .00 Title 38D5 Group and 38C5 Group Note on Voltage Multiplier Start in the LCD Drive Control Circuit Information Category Technical Notification Lot No.Applicable Products 38D5 Group 38C5 Group −− Reference Document−− Please note the following when using a voltage multiplier while the voltage multiplier control bit is set to 1 for the applicable products shown below. 1 . Applicable Products 38D5 Group QzROM version M38D58G8-XXXFP/HP, M38D58G8FP/HP, M38D59GC-XXXFP/HP, M38D59GCFP/HP, M38D59GF-XXXFP/HP, M38D59GFFP/HP 38D5 Group Flash memory version M38D59FFFP/HP 38C5 Group Mask ROM version M38C58M8-XXXFP/HP, M38C59MC-XXXFP/HP, M38C59MF-XXXFP/HP 38C5 Group One-time PROM version M38C59GFFP/HP 2. Note When starting the voltage multiplier under the conditions in the shadowed areas, the voltage multiplier may not start correctly. [38D5: QzROM version, 38C5: Mask ROM version]VL1 input voltage [V]VL1 input voltage [V] 5.55.53.03.01 .31 .32.12.12.02.01 .51 .51 .351 .35Vcc [V]Vcc [V][38D5: QzROM version, 38C5: Mask ROM version]Vcc [V]Vcc [V]3.63.63.03.01 .31 .32.12.1[38C5: One-time PROM version]VL1 input voltage [V]VL1 input voltage [V]2.02.01 .51 .51 .351 .35[38C5: One-time PROM version]Vcc [V]Vcc [V]5.55.53.03.01 .31 .32.12.1[38D5: Flash memory version]VL1 input voltage [V]VL1 input voltage [V]1 .41 .42.72.7[38D5: Flash memory version] RENESAS TECHNICAL UPDATE TN-380-A068A/E Date: Dec. 08, 2009 Page 2 of 2 3. Countermeasure When starting the voltage multiplier, connect LCD internal VL3 to VCC using the VL3 connection bit and enable the voltage multiplier using the voltage multiplier control bit after applying 1 .3 to 2.1 V to the VL1 pin. Wait until the VL3 pin voltage becomes 0.65 x (VL1 x 3) [V] or higher and connect LCD internal VL3 to the VL3 pin using the VL3 connection bit. Program example After the voltage multiplier starts operating, it continues operating correctly even if Vcc and VL1 are in the shadowed areas. There is no problem if the above-mentioned measure is performed when using the voltage multiplier under conditions other than the conditions in the shadowed areas. CLB 1 ,LM2 SEB 0,LM2 Wait time SEB 1 ,LM2 ; Connect LCD internal VL3 to Vcc. ; Enable the voltage multiplier. ; Wait until the VL3 pin voltage ≥ 0.65 x (VL1 x 3) V]. ; Connect LCD internal VL3 to the VL3 pin. Voltage multiplier control bit: Bit 0 in the LM2 registerVL3 connection bit: Bit 1 in the LM2 register LM2 register: LCD mode register 2 (address 001 41 6)

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