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PCF2119DU Datasheet(PDF) 7 Page - NXP Semiconductors |
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PCF2119DU Datasheet(HTML) 7 Page - NXP Semiconductors |
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7 / 83 page  PCF2119X All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 7 — 15 November 2010 7 of 83 NXP Semiconductors PCF2119x LCD controllers/drivers [1] Always put VDD2 =VDD3. [2] When the I2C-bus is used, the parallel interface pin E must be LOW. [3] The substrate (rear side of the die) is wired to VSS but should not be electrically connected. [4] On the device connected to VSS1. [5] When the parallel bus is used, the pins SCL and SDA must be connected to VSS1 or VDD1; they must not be left open-circuit. [6] In the I2C-bus read mode, ports DB7 to DB4 and DB2 to DB0 should be connected to VDD1 or left open-circuit. [7] When the 4-bit interface is used without reading out from the PCF2119x (bit R/W is set permanently to logic 0), the unused ports DB4 to DB0 can either be set to VSS1 or VDD1 instead of leaving them open-circuit. PD 155 power-down mode select • for normal operation pin PD must be LOW SDA 156 and 157 [5] I2C-bus serial data input/output R/W 158 read/write input • pin R/W = HIGH selects the read operation • pin R/W = LOW selects the write operation • this pin has an internal pull-up resistor RS 159 register select pin; • this pin has an internal pull-up resistor DB0 to DB2, DB3/SA0, DB4 to DB7 160 to 162, 163, 164 to 167 [6][7] 8 bit bidirectional data bus (bit 0 to bit 7) • the 8-bit bidirectional data bus (3-state) transfers data between the microcontroller and the PCF2119x • pin DB7 may be used as the busy flag, signalling that internal operations are not yet completed • 4-bit operations the 4 higher order lines DB7 to DB4 are used, DB3 to DB0 must be left open-circuit • data bus line DB3 has an alternative function (SA0) as the I2C-bus address pin • each data line has its own internal pull-up resistor OSC 168 oscillator or external clock input • when the on-chip oscillator is used this pin must be connected to VDD1 Table 3. Pin description …continued Symbol Pin Description |
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Similar Description - PCF2119DU |
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