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PCF8537 датащи(PDF) 48 Page - NXP Semiconductors |
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PCF8537 датащи(HTML) 48 Page - NXP Semiconductors |
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48 / 82 page ![]() PCF8537 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved. Product data sheet Rev. 1 — 31 May 2012 48 of 82 NXP Semiconductors PCF8537 Industrial LCD driver for multiplex rates up to 1:8 When bit IBS is set to bank 1 (see Table 18 on page 14), then data is stored in row 4 and row 5. 8.8.4 RAM filling in 1:4 multiplex drive mode In the 1:4 multiplex drive mode the eight transmitted data bits are placed in two successive display RAM columns of four rows (see Figure 36). In order to fill the whole four RAM rows 22 bytes need to be sent to the PCF8537. When bit IBS is set to bank 1 (see Table 18 on page 14), then data is stored in rows 4 to row 7. 8.8.5 RAM filling in 1:6 multiplex drive mode In the 1:6 multiplex drive mode the RAM is organized in six rows and 46 columns. The eight transmitted data bits are placed in such a way, that a column is filled up (see Figure 37). The remaining bits are wrapped up into the next column. In order to fill the whole RAM addresses 35 bytes need to be sent to the PCF8537, however the four least significant bits of the 35th byte are discarded. Fig 36. Display RAM filling order in 1:4 multiplex drive mode 0 1 2 34 56 7 39 40 41 42 43 b0 b1 b2 b3 b4 b5 b6 b7 0 MSB LSB 1 2 3 transmitted data byte b7 b6 b5 b4 b3 b2 b1 b0 display RAM columns/segment outputs (S) columns display RAM rows/ backplane outputs (BP) rows 013aaa649 |
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