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PCA2117DUGS/DA Datasheet(PDF) 11 Page - NXP Semiconductors |
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PCA2117DUGS/DA Datasheet(HTML) 11 Page - NXP Semiconductors |
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11 / 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 11 of 107 NXP Semiconductors PCA2117 Automotive LCD driver for character displays 8.1.1.6 Command: Read_reg_select The Read_reg_select command allows choosing to read out the temperature or the status registers (Checksum to Status_Register_9) of the device (see Table 12). [1] Default value. [2] Only valid for RAM. See .Section 8.5.2 “Checksum” 8.1.1.7 Command: Read_status_reg With the Read_status_reg command the temperature, checksum, and the status registers can be read out. The behavior of the Read_status_reg command is controlled by the SO bit of the Read_reg_select command (see Table 11). Table 11. Read_reg_select - select registers for readout command bit description Bit Symbol Value Description -R/W 0 fixed value - RS[1:0] 00 fixed value 7 to 2 - 000001 fixed value 1XC checksum mode setting 0[1] XOR checksum 1 CRC-8 checksum 0SO readout select 0[1] temperature 1 status registers Table 12. Read_status_reg - readout register command bit description Bit Symbol Value Description -R/W 1 fixed value - RS[1:0] 00 fixed value Temperature readout if SO = 0 (see Table 11) 7 to 0 TD[7:0] 00000000 to 11111111[1] temperature readout Status readout if SO = 1 (see Table 11) Checksum 7 to 0 CS[7:0] 00000000[1] to 11111111 checksum result from RAM writing with checksum mode set by bit XC (see Table 11) Status_Register_1 7, 6 - 00 fixed value 5, 4 RR[1:0] see Table 13 CGRAM and CGROM select status 3 I_D see Table 20 address stepping select status 2S display shift select status 1 M see Table 21 display lines setting status 0SL multiplex drive mode setting status Status_Register_2 7 to 5 INV[2:0] see Table 22 inversion mode setting status 4 to 0 FF[4:0] see Table 24 frame frequency setting status |
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