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P89LPC9401 Datasheet(PDF) 6 Page - NXP Semiconductors |
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P89LPC9401 Datasheet(HTML) 6 Page - NXP Semiconductors |
6 / 59 page P89LPC9401_1 © Koninklijke Philips Electronics N.V. 2005. All rights reserved. Preliminary data sheet Rev. 01 — 5 September 2005 6 of 59 Philips Semiconductors P89LPC9401 8-bit two-clock 80C51 microcontroller with 32 segment × 4 LCD driver 5. Functional diagram Fig 3. LCD display controller block diagram 002aab470 LCD VOLTAGE SELECTOR BACKPLANE OUTPUTS INPUT BANK SELECTOR POWER- ON RESET DISPLAY RAM 40 × 4 BITS OUTPUT BANK SELECTOR SUB- ADDRESS COUNTER DATA POINTER BLINKER TIMING OSCILLATOR DISPLAY CONTROLLER COMMAND DECODER I2C-BUS CONTROLLER INPUT FILTERS DISPLAY SEGMENT OUTPUTS LCD BIAS GENERATOR BP0 A0 A1 A2 BP1 BP2 BP3 S0 TO S39 DISPLAY LATCH SHIFT REGISTER SA0 SDA SCL OSC SYNC CLK VSS VDD VLCD Fig 4. P89LPC9401 functional diagram VDD VSS PORT 0 PORT 3 TXD RXD T0 INT0 INT1 RST SCL SDA 002aab462 CMP2 CIN2B CIN2A CIN1B CIN1A CMPREF CMP1 T1 XTAL2 XTAL1 KBI0 KBI1 KBI2 KBI3 KBI4 KBI5 KBI6 KBI7 CLKOUT MOSI MISO SPICLK PORT 1 PORT 2 SCL SDA BP[0:3] S[0:31] P89LPC9401 |
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