データシートサーチシステム |
|
LC75742W データシート(PDF) 11 Page - Sanyo Semicon Device |
|
LC75742W データシート(HTML) 11 Page - Sanyo Semicon Device |
11 / 18 page Multiple Key Presses The LC75742E/W, even without diodes in the key scan lines, can scan for any combination of dual key presses, any combination of triple key presses on any of the KI1 to KI5 key scan input pin lines, or any combination of multiple key presses on any of the KS1 to KS6 key scan output lines. However, keys that are not pressed may be seen as having been pressed for any other multiple key press combination. Accordingly, applications must insert diodes at each key. Also, to reject any triple and higher multiple key presses, if three or more data readout are 1 ignore the data by the software or in other ways. Notes on the BLK Pin and Display Control Since the states of the IC internal data (D1 to D82, and the control data) are undefined when power is first applied, applications should turn off the display (i.e. set S1 to S41, and G1 and G2 low) by setting the BLK pin low at the same time as power is applied. Applications should transfer all 128 bits of the serial data while BLK is held low, and only then set BLK high. This will prevent random meaningless display at power on. (See figure 4.) Note on the Power on Sequence Applications must observe the following sequences when turning the power on or off. • At power on: First turn on the logic system power (VDD), and then turn on the driver power (VFL) • At power off: First turn off the driver power (VFL), and then turn off the logic system power (VDD). No. 6142-11/18 LC75742E, LC75742W Serial data transfer Serial data transfer Serial data transfer Key data read Key data read request Key data read Key data read request Key address (8FH) Key address Figure 4 Key input (KS6 line) Key scan |
同様の部品番号 - LC75742W |
|
同様の説明 - LC75742W |
|
|
リンク URL |
プライバシーポリシー |
ALLDATASHEET.JP |
ALLDATASHEETはお客様のビジネスに役立ちますか? [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |