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PCA2117DUGS/DA 数据表(PDF) 17 Page - NXP Semiconductors |
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PCA2117DUGS/DA 数据表(HTML) 17 Page - NXP Semiconductors |
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17 / 107 page  PCA2117 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved. Product data sheet Rev. 4 — 8 April 2015 17 of 107 NXP Semiconductors PCA2117 Automotive LCD driver for character displays 8.1.2.3 Command: Entry_mode_set The Entry_mode_set command sets the address stepping and the shift of the display. [1] Default value. Bit I_D: When bit I_D = 1 the DDRAM, CGRAM, or ICON-RAM address increments by 1 when data is written into or read from the DDRAM, CGRAM or ICON-RAM. The cursor or blink position moves to the right. When bit I_D = 0 the DDRAM, CGRAM, or ICON-RAM address decrements by 1 when data is written into or read from the DDRAM, CGRAM or ICON-RAM. The cursor or blink position moves to the left. Bit S: When bit S = 0, the display does not shift. During DDRAM write, when bit S = 1 and bit I_D = 0, the entire display shifts to the right. When bit S = 1 and bit I_D = 1, the entire display shifts to the left. Thus it appears as if the cursor remains and the display moves. The display does not shift when reading from the DDRAM, CGRAM or ICON-RAM or when writing to or from the DDRAM, CGRAM or ICON-RAM. Table 20. Entry_mode_set - entry mode bit description Bit Symbol Value Description -R/W 0 fixed value - RS[1:0] 10 fixed value 7 to 2 - 001010 fixed value 1I_D address stepping select 0 DDRAM, CGRAM or ICON-RAM address decrements by 1, cursor moves to the left 1[1] DDRAM, CGRAM or ICON-RAM address increments by 1, cursor moves to the right 0S display shift select 0[1] display does not shift 1display shifts Command: Entry_mode_set, S = 1, display line setting: 2 line 20 characters. Fig 3. Example of the display shift |
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