NXP Semiconductors LPC43 Series User Manual

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NXP Semiconductors LPC43 Series User Manual Manual pdf 781 page image

UM10503 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.User manual Rev. 1.3 — 6 July 2012 781 of 1269NXP Semiconductors UM10503Chapter 27: LPC43xx LCD27.6.16 Cursor Control registerThe CRSR_CTRL register provides access to frequently used cursor functions, such asthe display on/off control for the cursor, and the cursor number.If a 32x32 cursor is selected, one of four 32x32 cursors can be enabled. The images eachoccupy one quarter of the image memory, with Cursor0 from location 0, followed byCursor1 from address 0x100, Cursor2 from 0x200 and Cursor3 from 0x300. If a 64x64cursor is selected only one cursor fits in the image buffer, and no selection is possible.Similar frame synchronization rules apply to the cursor number as apply to the cursorcoordinates. If CrsrFramesync is 1, the displayed cursor image is only changed during thevertical frame blanking period. If CrsrFrameSync is 0, the cursor image index is changedimmediately, even if the cursor is currently being scanned.27.6.17 Cursor Configuration registerThe CRSR_CFG register provides overall configuration information for the hardwarecursor.Table 617. Cursor Image registers (CRSR_IMG, address 0x4000 8800 (CRSR_IMG0) to0x4000 8BFC (CRSR_IMG1)) bit descriptionBit Symbol Description Resetvalue31:0 CRSR_IMG Cursor Image data.The 256 words of the cursor image registers define theappearance of either one 64x64 cursor or 4 32x32 cursors.0x0Table 618. Cursor Control register (CRSR_CTRL, address 0x4000 8C00) bit descriptionBit Symbol Description Resetvalue0 CrsrOn Cursor enable.0 = Cursor is not displayed.1 = Cursor is displayed.0x03:1 - Reserved, user software should not write ones to reservedbits. The value read from a reserved bit is not defined.0x05:4 CRSRNUM1_0 Cursor image number.If the selected cursor size is 6x64, this field has no effect. Ifthe selected cursor size is 32x32:00 = Cursor0.01 = Cursor1.10 = Cursor2.11 = Cursor3.0x031:6 - Reserved, user software should not write ones to reservedbits. The value read from a reserved bit is not defined.0x0