PCA85162

PCA85162 Universal LCD driver for low multiplex rates Rev. 2 — 16 June 2011 Product data sheet 1. General description The PCA85162 is a peripheral device which interfaces to almost any Liquid Crystal Display (LCD)1 with low multiplex rates. It generates the drive signals for any static or multiplexed LCD containing up to four backplanes and up to 32 segments. It can be easily cascaded for larger LCD applications. The PCA85162 is compatible with most microcontrollers and communicates via the two-line bidirectional I2C-bus. Communication overheads are minimized by a display RAM with auto-incremented addressing, by hardware subaddressing, and by display memory switching (static and duplex drive modes). 2. Features and benefits       AEC-Q100 compliant for automotive applications Single chip LCD controller and driver Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing Selectable display bias configuration: static, 1⁄2, or 1⁄3 Internal LCD bias generation with voltage-follower buffers 32 segment drives:  Up to sixteen 7-segment alphanumeric characters  Up to eight 14-segment alphanumeric characters  Any graphics of up to 128 elements 32  4-bit RAM for display data storage Display memory bank switching in static and duplex drive modes Versatile blinking modes Independent supplies possible for LCD and logic voltages Wide power supply range: from 1.8 V to 5.5 V Wide logic LCD supply range:  From 2.5 V for low-threshold LCDs  Up to 8.0 V for guest-host LCDs and high-threshold twisted nematic LCDs Low power consumption Extended temperature range up to 95 C 400 kHz I2C-bus interface No external components required Manufactured in silicon gate CMOS process            1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 18. NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 3. Ordering information Table 1. Ordering information Package Name Description Version SOT362-1 Type number PCA85162T/Q900/1 TSSOP48 plastic thin shrink small outline package; 48 leads; body width 6.1 mm 4. Marking Table 2. Marking codes Marking code PCA85162T Type number PCA85162T/Q900/1 5. Block diagram BP0 BP2 BP1 BP3 S0 to S31 32 VLCD BACKPLANE OUTPUTS DISPLAY SEGMENT OUTPUTS LCD VOLTAGE SELECTOR DISPLAY CONTROLLER DISPLAY REGISTER VSS LCD BIAS GENERATOR OUTPUT BANK SELECT AND BLINK CONTROL CLK SYNC PCA85162 CLOCK SELECT AND TIMING BLINKER TIMEBASE DISPLAY RAM 40 × 4-BIT OSC VDD SCL SDA OSCILLATOR POWER-ON RESET COMMAND DECODER WRITE DATA CONTROL DATA POINTER AND AUTO INCREMENT INPUT FILTERS I2C-BUS CONTROLLER SUBADDRESS COUNTER SA0 A0 A1 A2 013aaa054 Fig 1. Block diagram of PCA85162 PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 2 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 6. Pinning information 6.1 Pinning S23 S24 S25 S26 S27 S28 S29 S30 S31 1 2 3 4 5 6 7 8 9 48 S22 47 S21 46 S20 45 S19 44 S18 43 S17 42 S16 41 S15 40 S14 39 S13 38 S12 37 S11 36 S10 35 S9 34 S8 33 S7 32 S6 31 S5 30 S4 29 S3 28 S2 27 S1 26 S0 25 BP3 013aaa055 SDA 10 SCL 11 SYNC 12 CLK 13 VDD 14 OSC 15 A0 16 A1 17 A2 18 SA0 19 VSS 20 VLCD 21 BP0 22 BP2 23 BP1 24 PCA85162T Top view. For mechanical details, see Figure 26. Fig 2. Pinning diagram for TSSOP48 (PCA85162T) PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 3 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 6.2 Pin description Table 3. Symbol SDA SCL SYNC CLK VDD OSC A0 to A2 SA0 VSS VLCD BP0 to BP3 S0 to S22, S23 to S31 Pin description Pin 10 11 12 13 14 15 16 to 18 19 20 21 22 to 25 26 to 48, 1 to 9 Type input/output input input/output input/output supply input input input supply supply output output Description I2C-bus serial data line I2C-bus serial clock cascade synchronization clock line supply voltage internal oscillator enable subaddress inputs I2C-bus address input ground supply voltage LCD supply voltage LCD backplane outputs LCD segment outputs PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 4 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 7. Functional description The PCA85162 is a versatile peripheral device designed to interface between any microcontroller to a wide variety of LCD segment or dot matrix displays (see Figure 3). It can directly drive any static or multiplexed LCD containing up to four backplanes and up to 32 segments. dot matrix 7-segment with dot 14-segment with dot and accent 013aaa312 Fig 3. Example of displays suitable for PCA85162 The possible display configurations of the PCA85162 depend on the number of active backplane outputs required. A selection of display configurations is shown in Table 4. All of these configurations can be implemented in the typical system shown in Figure 4. Table 4. Number of Backplanes 4 3 2 1 [1] [2] Selection of possible display configurations Icons 128 96 64 32 Digits/Characters 7-segment[1] 16 12 8 4 14-segment[2] 8 6 4 2 Dot matrix/ Elements 128 dots (4  32) 96 dots (3  32) 64 dots (2  32) 32 dots (1  32) 7 segment display has 8 elements including the decimal point. 14 segment display has 16 elements including decimal point and accent dot. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 5 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates VDD R≤ tr 2Cb SDA 10 SCL OSC 11 15 16 A0 VDD 14 VLCD 21 32 segment drives LCD PANEL HOST MICROPROCESSOR/ MICROCONTROLLER PCA85162 4 backplanes 17 A1 18 A2 19 20 (up to 128 elements) SA0 VSS 013aaa056 VSS The resistance of the power lines must be kept to a minimum. Fig 4. Typical system configuration The host microcontroller maintains the 2-line I2C-bus communication channel with the PCA85162. The internal oscillator is enabled by connecting pin OSC to pin VSS. The appropriate biasing voltages for the multiplexed LCD waveforms are generated internally. The only other connections required to complete the system are the power supplies (VDD, VSS, and VLCD) and the LCD panel chosen for the application. 7.1 Power-On Reset (POR) At power-on the PCA85162 resets to the following starting conditions: • • • • • • • All backplane and segment outputs are set to VLCD The selected drive mode is: 1:4 multiplex with 1⁄3 bias Blinking is switched off Input and output bank selectors are reset The I2C-bus interface is initialized The data pointer and the subaddress counter are cleared (set to logic 0) Display is disabled Remark: Do not transfer data on the I2C-bus for at least 1 ms after a power-on to allow the reset action to complete. 7.2 LCD bias generator Fractional LCD biasing voltages are obtained from an internal voltage divider consisting of three impedances connected in series between VLCD and VSS. The center impedance is bypassed by switch if the 1⁄2 bias voltage level for the 1:2 multiplex drive mode configuration is selected. The LCD voltage can be temperature compensated externally, using the supply to pin VLCD. 7.3 LCD voltage selector The LCD voltage selector coordinates the multiplexing of the LCD in accordance with the selected LCD drive configuration. The operation of the voltage selector is controlled by the mode-set command from the command decoder. The biasing configurations that apply to the preferred modes of operation, together with the biasing characteristics as functions of VLCD and the resulting discrimination ratios (D) are given in Table 5. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 6 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates Discrimination is a term which is defined as the ratio of the on and off RMS voltage across a segment. It can be thought of as a measurement of contrast. Table 5. LCD drive mode static Biasing characteristics Number of: LCD bias Backplanes Levels configuration 1 2 3 4 4 4 static 1⁄ 2 1⁄ 3 1⁄ 3 1⁄ 3 V off  RMS  -----------------------V LCD 0 0.354 0.333 0.333 0.333 V on  RMS  ----------------------V LCD 1 0.791 0.745 0.638 0.577 V on  RMS  D = -----------------------V off  RMS   2.236 2.236 1.915 1.732 1:2 multiplex 2 1:2 multiplex 2 1:3 multiplex 3 1:4 multiplex 4 A practical value for VLCD is determined by equating Voff(RMS) with a defined LCD threshold voltage (Vth(off)), typically when the LCD exhibits approximately 10 % contrast. In the static drive mode a suitable choice is VLCD > 3Vth(off). Multiplex drive modes of 1:3 and 1:4 with 1⁄2 bias are possible but the discrimination and hence the contrast ratios are smaller. 1 Bias is calculated by ------------ , where the values for a are 1+a a = 1 for 1⁄2 bias a = 2 for 1⁄3 bias The RMS on-state voltage (Von(RMS)) for the LCD is calculated with Equation 1: V on  RMS  = a 2 + 2a + n ----------------------------2 n  1 + a (1) V LCD where the values for n are n = 1 for static drive mode n = 2 for 1:2 multiplex drive mode n = 3 for 1:3 multiplex drive mode n = 4 for 1:4 multiplex drive mode The RMS off-state voltage (Voff(RMS)) for the LCD is calculated with Equation 2: V off  RMS  = a 2 – 2a + n ----------------------------2 n  1 + a (2) V LCD Discrimination is the ratio of Von(RMS) to Voff(RMS) and is determined from Equation 3: V on  RMS  D = ---------------------- = V off  RMS  a + 2a + n -------------------------2 a – 2a + n 2 (3) PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 7 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates Using Equation 3, the discrimination for an LCD drive mode of 1:3 multiplex with 1⁄ 1⁄ 2 2 bias is 3 = 1.732 and the discrimination for an LCD drive mode of 1:4 multiplex with 21 bias is ---------- = 1.528 . 3 The advantage of these LCD drive modes is a reduction of the LCD full scale voltage VLCD as follows: • 1:3 multiplex (1⁄2 bias): V LCD = 6  V off  RMS  = 2.449V off  RMS   --------------------• 1:4 multiplex (1⁄2 bias): V LCD =  4  3 - = 2.309V off  RMS  3 These compare with V LCD = 3V off  RMS  when 1⁄3 bias is used. It should be noted that VLCD is sometimes referred as the LCD operating voltage. 7.3.1 Electro-optical performance Suitable values for Von(RMS) and Voff(RMS) are dependent on the LCD liquid used. The RMS voltage, at which a pixel will be switched on or off, determine the transmissibility of the pixel. For any given liquid, there are two threshold values defined. One point is at 10 % relative transmission (at Vth(off)) and the other at 90 % relative transmission (at Vth(on)), see Figure 5. For a good contrast performance, the following rules should be followed: V on  RMS   V th  on  V off  RMS   V th  off  (4) (5) Von(RMS) and Voff(RMS) are properties of the display driver and are affected by the selection of a, n (see Equation 1 to Equation 3) and the VLCD voltage. Vth(off) and Vth(on) are properties of the LCD liquid and can be provided by the module manufacturer. It is important to match the module properties to those of the driver in order to achieve optimum performance. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 8 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 100 % 90 % Relative Transmission 10 % Vth(off) OFF SEGMENT Vth(on) VRMS [V] ON SEGMENT 013aaa494 GREY SEGMENT Fig 5. Electro-optical characteristic: relative transmission curve of the liquid PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 9 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 7.4 LCD drive mode waveforms 7.4.1 Static drive mode The static LCD drive mode is used when a single backplane is provided in the LCD. The backplane (BPn) and segment (Sn) drive waveforms for this mode are shown in Figure 6. Tfr VLCD BP0 VSS VLCD Sn VSS VLCD Sn+1 VSS (a) Waveforms at driver. VLCD LCD segments state 1 (on) state 2 (off) state 1 0V −VLCD VLCD state 2 0V −VLCD (b) Resultant waveforms at LCD segment. 013aaa207 Vstate1(t) = VSn(t)  VBP0(t). Von(RMS) = VLCD. Vstate2(t) = V(Sn + 1)(t)  VBP0(t). Voff(RMS) = 0 V. Fig 6. Static drive mode waveforms PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 10 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 7.4.2 1:2 Multiplex drive mode When two backplanes are provided in the LCD, the 1:2 multiplex mode applies. The PCA85162 allows the use of 1⁄2 bias or 1⁄3 bias in this mode as shown in Figure 7 and Figure 8. Tfr VLCD BP0 VLCD/2 VSS state 1 VLCD BP1 VLCD/2 VSS VLCD Sn VSS VLCD Sn+1 VSS (a) Waveforms at driver. VLCD VLCD/2 state 1 0V −VLCD/2 −VLCD LCD segments state 2 VLCD VLCD/2 state 2 0V −VLCD/2 −VLCD (b) Resultant waveforms at LCD segment. 013aaa208 Vstate1(t) = VSn(t)  VBP0(t). Von(RMS) = 0.791VLCD. Vstate2(t) = VSn(t)  VBP1(t). Voff(RMS) = 0.354VLCD. Fig 7. Waveforms for the 1:2 multiplex drive mode with 1⁄2 bias PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 11 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates Tfr BP0 VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS (a) Waveforms at driver. VLCD 2VLCD/3 VLCD/3 LCD segments state 1 state 2 BP1 Sn Sn+1 state 1 0V −VLCD/3 −2VLCD/3 −VLCD VLCD 2VLCD/3 VLCD/3 state 2 0V −VLCD/3 −2VLCD/3 −VLCD (b) Resultant waveforms at LCD segment. 013aaa209 Vstate1(t) = VSn(t)  VBP0(t). Von(RMS) = 0.745VLCD. Vstate2(t) = VSn(t)  VBP1(t). Voff(RMS) = 0.333VLCD. Fig 8. Waveforms for the 1:2 multiplex drive mode with 1⁄3 bias PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 12 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 7.4.3 1:3 Multiplex drive mode When three backplanes are provided in the LCD, the 1:3 multiplex drive mode applies, as shown in Figure 9. Tfr VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS (a) Waveforms at driver. VLCD 2VLCD/3 VLCD/3 state 1 0V −VLCD/3 −2VLCD/3 −VLCD VLCD 2VLCD/3 VLCD/3 state 2 0V −VLCD/3 −2VLCD/3 −VLCD LCD segments BP0 state 1 state 2 BP1 BP2 Sn Sn+1 Sn+2 (b) Resultant waveforms at LCD segment. 013aaa210 Vstate1(t) = VSn(t)  VBP0(t). Von(RMS) = 0.638VLCD. Vstate2(t) = VSn(t)  VBP1(t). Voff(RMS) = 0.333VLCD. Fig 9. Waveforms for the 1:3 multiplex drive mode with 1⁄3 bias PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 13 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 7.4.4 1:4 Multiplex drive mode When four backplanes are provided in the LCD, the 1:4 multiplex drive mode applies as shown in Figure 10. Tfr VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS VLCD 2VLCD/3 VLCD/3 VSS (a) Waveforms at driver. VLCD 2VLCD/3 VLCD/3 0V −VLCD/3 −2VLCD/3 −VLCD VLCD 2VLCD/3 VLCD/3 0V −VLCD/3 −2VLCD/3 −VLCD state 1 state 2 LCD segments BP0 BP1 BP2 BP3 Sn Sn+1 Sn+2 Sn+3 state 1 state 2 (b) Resultant waveforms at LCD segment. 013aaa211 Vstate1(t) = VSn(t)  VBP0(t). Von(RMS) = 0.577VLCD. Vstate2(t) = VSn(t)  VBP1(t). Voff(RMS) = 0.333VLCD. Fig 10. Waveforms for the 1:4 multiplex drive mode with 1⁄3 bias PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 14 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 7.5 Oscillator 7.5.1 Internal clock The internal logic of the PCA85162 and its LCD drive signals are timed either by its internal oscillator or by an external clock. The internal oscillator is enabled by connecting pin OSC to pin VSS. If the internal oscillator is used, the output from pin CLK can be used as the clock signal for several PCA85162 in the system that are connected in cascade. 7.5.2 External clock Pin CLK is enabled as an external clock input by connecting pin OSC to VDD. The LCD frame signal frequency is determined by the clock frequency (fclk). Remark: A clock signal must always be supplied to the device; removing the clock may freeze the LCD in a DC state, which is not suitable for the liquid crystal. 7.6 Timing The PCA85162 timing controls the internal data flow of the device. This includes the transfer of display data from the display RAM to the display segment outputs. In cascaded applications, the correct timing relationship between each PCA85162 in the system is maintained by the synchronization signal at pin SYNC. The timing also generates the LCD frame signal whose frequency is derived from the clock frequency. The frame signal frequency is a fixed division of the clock frequency from either the internal or an external f clk clock: f fr = ------24 7.7 Display register The display register holds the display data while the corresponding multiplex signals are generated. 7.8 Segment outputs The LCD drive section includes 32 segment outputs S0 to S31 which should be connected directly to the LCD. The segment output signals are generated in accordance with the multiplexed backplane signals and with data residing in the display register. When less than 32 segment outputs are required, the unused segment outputs should be left open-circuit. 7.9 Backplane outputs The LCD drive section includes four backplane outputs BP0 to BP3 which must be connected directly to the LCD. The backplane output signals are generated in accordance with the selected LCD drive mode. If less than four backplane outputs are required, the unused outputs can be left open-circuit. • In 1:3 multiplex drive mode, BP3 carries the same signal as BP1, therefore these two adjacent outputs can be tied together to give enhanced drive capabilities. • In 1:2 multiplex drive mode, BP0 and BP2, respectively, BP1 and BP3 carry the same signals and may also be paired to increase the drive capabilities. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 15 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates • In static drive mode the same signal is carried by all four backplane outputs and they can be connected in parallel for very high drive requirements. 7.10 Display RAM The display RAM is a static 32  4-bit RAM which stores LCD data. There is a one-to-one correspondence between • the bits in the RAM bitmap and the LCD elements • the RAM columns and the segment outputs • the RAM rows and the backplane outputs. A logic 1 in the RAM bitmap indicates the on-state of the corresponding LCD element; similarly, a logic 0 indicates the off-state. The display RAM bit map, Figure 11, shows the rows 0 to 3 which correspond with the backplane outputs BP0 to BP3, and the columns 0 to 31 which correspond with the segment outputs S0 to S31. In multiplexed LCD applications the segment data of the first, second, third, and fourth row of the display RAM are time-multiplexed with BP0, BP1, BP2, and BP3 respectively. columns display RAM addresses/segment outputs (S) rows 0 display RAM rows/ 1 backplane outputs (BP) 2 3 001aac265 0 1 2 3 4 27 28 29 30 31 The display RAM bitmap shows the direct relationship between the display RAM column and the segment outputs; and between the bits in a RAM row and the backplane outputs. Fig 11. Display RAM bit map When display data is transmitted to the PCA85162, the display bytes received are stored in the display RAM in accordance with the selected LCD drive mode. The data is stored as it arrives and depending on the current multiplex drive mode the bits are stored singularly, in pairs, triples or quadruples. To illustrate the filling order, an example of a 7-segment numeric display showing all drive modes is given in Figure 12; the RAM filling organization depicted applies equally to other LCD types. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 16 of 46 xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx Product data sheet Rev. 2 — 16 June 2011 17 of 46 PCA85162 NXP Semiconductors drive mode LCD segments LCD backplanes display RAM filling order columns display RAM address/segment outputs (s) byte1 transmitted display byte Sn+2 Sn+3 static Sn+4 Sn+5 Sn+6 e d f a b g c Sn+1 Sn Sn+7 DP BP0 rows display RAM 0 rows/backplane 1 outputs (BP) 2 3 n c x x x n+1 b x x x n+2 a x x x n+3 f x x x n+4 g x x x n+5 e x x x n+6 d x x x n+7 DP x x x MSB cba f LSB g e d DP BP0 Sn 1:2 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. a f g b columns display RAM address/segment outputs (s) byte1 byte2 rows display RAM 0 rows/backplane 1 outputs (BP) 2 3 n a b x x n+1 f g x x n+2 e c x x n+3 d DP x x MSB ab f LSB g e c d DP Sn+1 multiplex Sn+2 Sn+3 e d c BP1 DP Sn+1 1:3 Sn+2 f a b g BP0 Sn n rows display RAM 0 b rows/backplane 1 DP outputs (BP) 2c 3x columns display RAM address/segment outputs (s) byte1 byte2 byte3 n+1 a d g x n+2 f e x x MSB b DP c a d g f LSB Universal LCD driver for low multiplex rates multiplex e d c BP1 DP BP2 e Sn 1:4 f a b g columns display RAM address/segment outputs (s) byte1 byte2 byte3 byte4 byte5 BP0 BP2 n rows display RAM 0 a rows/backplane 1c BP3 outputs (BP) 2 b 3 DP n+1 f e g d MSB a c b DP f LSB egd multiplex e c d PCA85162 BP1 DP Sn+1 001aaj646 x = data bit unchanged. Fig 12. Relationship between LCD layout, drive mode, display RAM filling order, and display data transmitted over the I2C-bus NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates The following applies to Figure 12: • In static drive mode the eight transmitted data bits are placed in row 0 as one byte. • In 1:2 multiplex drive mode the eight transmitted data bits are placed in pairs into row 0 and 1 as two successive 4-bit RAM words. • In 1:3 multiplex drive mode the eight bits are placed in triples into row 0, 1, and 2 as three successive 3-bit RAM words, with bit 3 of the third address left unchanged. It is not recommended to use this bit in a display because of the difficult addressing. This last bit may, if necessary, be controlled by an additional transfer to this address but care should be taken to avoid overwriting adjacent data because always full bytes are transmitted (see Section 7.10.3). • In 1:4 multiplex drive mode, the eight transmitted data bits are placed in quadruples into row 0, 1, 2, and 3 as two successive 4-bit RAM words. 7.10.1 Data pointer The addressing mechanism for the display RAM is realized using the data pointer. This allows the loading of an individual display data byte, or a series of display data bytes, into any location of the display RAM. The sequence commences with the initialization of the data pointer by the load-data-pointer command (see Table 12). Following this command, an arriving data byte is stored at the display RAM address indicated by the data pointer. The filling order is shown in Figure 12. After each byte is stored, the content of the data pointer is automatically incremented by a value dependent on the selected LCD drive mode: • • • • In static drive mode by eight In 1:2 multiplex drive mode by four In 1:3 multiplex drive mode by three In 1:4 multiplex drive mode by two If an I2C-bus data access is terminated early then the state of the data pointer is unknown. The data pointer should be re-written prior to further RAM accesses. 7.10.2 Subaddress counter The storage of display data is determined by the contents of the subaddress counter. Storage is allowed only when the content of the subaddress counter match with the hardware subaddress applied to A0, A1, and A2. The subaddress counter value is defined by the device-select command (see Table 13). If the content of the subaddress counter and the hardware subaddress do not match then data storage is inhibited but the data pointer is incremented as if data storage had taken place. The subaddress counter is also incremented when the data pointer overflows. In cascaded applications each PCA85162 in the cascade must be addressed separately. Initially, the first PCA85162 is selected by sending the device-select command matching the first device's hardware subaddress. Then the data pointer is set to the preferred display RAM address by sending the load-data-pointer command. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 18 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates Once the display RAM of the first PCA85162 has been written, the second PCA85162 is selected by sending the device-select command again. This time however the command matches the second device's hardware subaddress. Next the load-data-pointer command is sent to select the preferred display RAM address of the second PCA85162. This last step is very important because during writing data to the first PCA85162, the data pointer of the second PCA85162 is incremented. In addition, the hardware subaddress should not be changed whilst the device is being accessed on the I2C-bus interface. 7.10.3 RAM writing in 1:3 multiplex drive mode In 1:3 multiplex drive mode, the RAM is written as shown in Table 6 (see Figure 12 as well). Table 6. Standard RAM filling in 1:3 multiplex drive mode Assumption: BP2/S2, BP2/S5, BP2/S8 etc. are not connected to any elements on the display. Display RAM bits (rows)/ backplane outputs (BPn) 0 1 2 3 Display RAM addresses (columns)/segment outputs (Sn) 0 1 2 3 4 5 6 7 8 9 : a7 a6 a5 - a4 a3 a2 - a1 a0 - b7 b6 b5 - b4 b3 b2 - b1 b0 - c7 c6 c5 - c4 c3 c2 - c1 c0 - d7 d6 d5 - : : : : If the bit at position BP2/S2 would be written by a second byte transmitted, then the mapping of the segment bits would change as illustrated in Table 7. Table 7. Entire RAM filling by rewriting in 1:3 multiplex drive mode Assumption: BP2/S2, BP2/S5, BP2/S8 etc. are connected to elements on the display. Display RAM bits (rows)/ backplane outputs (BPn) 0 1 2 3 Display RAM addresses (columns)/segment outputs (Sn) 0 1 2 3 4 5 6 7 8 9 : a7 a6 a5 - a4 a3 a2 - a1/b7 b4 a0/b6 b3 b5 b2 - b1/c7 c4 b0/c6 c3 c5 c2 - c1/d7 d4 c0/d6 d3 d5 d2 - d1/e7 e4 d0/e6 e3 e5 e2 - : : : : In the case described in Table 7 the RAM has to be written entirely and BP2/S2, BP2/S5, BP2/S8 etc. have to be connected to elements on the display. This can be achieved by a combination of writing and rewriting the RAM like follows: • In the first write to the RAM, bits a7 to a0 are written. • In the second write, bits b7 to b0 are written, overwriting bits a1 and a0 with bits b7 and b6. • In the third write, bits c7 to c0 are written, overwriting bits b1 and b0 with bits c7 and c6. Depending on the method of writing to the RAM (standard or entire filling by rewriting), some elements remain unused or can be used, but it has to be considered in the module layout process as well as in the driver software design. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 19 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 7.10.4 Output bank selector The output bank selector (see Table 14) selects one of the four rows per display RAM address for transfer to the display register. The actual row selected depends on the particular LCD drive mode in operation and on the instant in the multiplex sequence. • In 1:4 multiplex mode, all RAM addresses of row 0 are selected, these are followed by the contents of row 1, 2, and then 3 • In 1:3 multiplex mode, rows 0, 1, and 2 are selected sequentially • In 1:2 multiplex mode, rows 0 and 1 are selected • In static mode, row 0 is selected The PCA85162 includes a RAM bank switching feature in the static and 1:2 multiplex drive modes. In the static drive mode, the bank-select command may request the contents of row 2 to be selected for display instead of the contents of row 0. In the 1:2 multiplex mode, the contents of rows 2 and 3 may be selected instead of rows 0 and 1. This gives the provision for preparing display information in an alternative bank and to be able to switch to it once it is assembled. 7.10.5 Input bank selector The input bank selector loads display data into the display RAM in accordance with the selected LCD drive configuration. Display data can be loaded in row 2 in static drive mode or in rows 2 and 3 in 1:2 multiplex drive mode by using the bank-select command (see Table 14). The input bank selector functions independently to the output bank selector. 7.11 Blinking The display blinking capabilities of the PCA85162 are very versatile. The whole display can blink at frequencies selected by the blink-select command (see Table 15). The blink frequencies are fractions of the clock frequency. The ratio between the clock and blink frequencies depends on the blink mode selected (see Table 8). An additional feature is for an arbitrary selection of LCD elements to blink. This applies to the static and 1:2 multiplex drive modes and can be implemented without any communication overheads. By means of the output bank selector, the displayed RAM banks are exchanged with alternate RAM banks at the blink frequency. This mode can also be specified by the blink-select command. In the 1:3 and 1:4 multiplex modes, where no alternative RAM bank is available, groups of LCD elements can blink by selectively changing the display RAM data at fixed time intervals. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 20 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates Blink frequencies[1] Blink frequency equation f clk f blink = --------768 f clk f blink = -----------1536 f clk f blink = -----------3072 Table 8. off 1 Blink mode 2 3 [1] The blink frequency is proportional to the clock frequency (fclk). For the range of the clock frequency see Table 19. The entire display can blink at a frequency other than the nominal blink frequency. This can be effectively performed by resetting and setting the display enable bit E at the required rate using the mode-set command (see Table 11). 7.12 Command decoder The command decoder identifies command bytes that arrive on the I2C-bus. The commands available to the PCA85162 are defined in Table 9. Table 9. Definition of PCA85162 commands Bit position labelled as - is not used. Command Bit mode-set load-data-pointer device-select bank-select blink-select Operation code 7 C C C C C 6 1 0 1 1 1 5 0 0 1 1 1 4 P[4:0] 0 1 1 0 1 0 A[2:0] 0 AB I BF[1:0] O 3 E 2 B 1 M[1:0] 0 Table 11 Table 12 Table 13 Table 14 Table 15 Reference All available commands carry a continuation bit C in their most significant bit position as shown in Figure 18. When this bit is set logic 1, it indicates that the next byte of the transfer to arrive will also represent a command. If this bit is set logic 0, it indicates that the command byte is the last in the transfer. Further bytes will be regarded as display data (see Table 10). Table 10. Bit 7 C bit description Symbol C 0 1 Value Description continue bit last control byte in the transfer; next byte will be regarded as display data control bytes continue; next byte will be a command too PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 21 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates Mode-set command bit description Symbol C E 0 1 Value 0, 1 10 Description see Table 10 fixed value unused display status disabled[1] enabled LCD bias configuration[2] 0 1 1⁄ 3 1⁄ 2 Table 11. Bit 7 6 to 5 4 3 2 B bias bias 1 to 0 M[1:0] 01 10 11 00 LCD drive mode selection static; BP0 1:2 multiplex; BP0, BP1 1:3 multiplex; BP0, BP1, BP2 1:4 multiplex; BP0, BP1, BP2, BP3 [1] [2] The possibility to disable the display allows implementation of blinking under external control. Not applicable for static drive mode. Table 12. Bit 7 6 to 5 4 to 0 Load-data-pointer command bit description Symbol C P[4:0] Value 0, 1 00 00000 to 11111 Description see Table 10 fixed value 5 bit binary value, 0 to 31; transferred to the data pointer to define one of 32 display RAM addresses Table 13. Bit 7 6 to 3 2 to 0 Device-select command bit description Symbol C A[2:0] Value 0, 1 1100 000 to 111 Description see Table 10 fixed value 3 bit binary value, 0 to 7; transferred to the subaddress counter to define one of eight hardware subaddresses PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 22 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates Bank-select command bit description Symbol C I 0 1 Value 0, 1 11110 Description Static 1:2 multiplex[1] see Table 10 fixed value input bank selection; storage of arriving display data RAM bit 0 RAM bit 2 RAM bit 0 RAM bit 2 RAM bits 0 and 1 RAM bits 2 and 3 RAM bits 0 and 1 RAM bits 2 and 3 Table 14. Bit 7 6 to 2 1 0 O 0 1 output bank selection; retrieval of LCD display data [1] The bank-select command has no effect in 1:3 and 1:4 multiplex drive modes. Table 15. Bit 7 6 to 3 2 Blink-select command bit description Symbol C AB 0 1 Value 0, 1 1110 Description see Table 10 fixed value blink mode selection normal blinking[1] alternate RAM bank blinking[2] blink frequency selection 00 01 10 11 off 1 2 3 1 to 0 BF[1:0] [1] [2] Normal blinking is assumed when the LCD multiplex drive modes 1:3 or 1:4 are selected. Alternate RAM bank blinking does not apply in 1:3 and 1:4 multiplex drive modes. 7.13 Display controller The display controller executes the commands identified by the command decoder. It contains the device’s status registers and coordinates their effects. The display controller is also responsible for loading display data into the display RAM in the correct filling order. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 23 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 8. Characteristics of the I2C-bus The I2C-bus is for bidirectional, two-line communication between different ICs or modules. The two lines are a Serial DAta Line (SDA) and a Serial CLock line (SCL). Both lines must be connected to a positive supply via a pull-up resistor when connected to the output stages of a device. Data transfer may be initiated only when the bus is not busy. 8.1 Bit transfer One data bit is transferred during each clock pulse. The data on the SDA line must remain stable during the HIGH period of the clock pulse as changes in the data line at this time will be interpreted as a control signal (see Figure 13). SDA SCL data line stable; data valid change of data allowed mba607 Fig 13. Bit transfer 8.2 START and STOP conditions Both data and clock lines remain HIGH when the bus is not busy. A HIGH-to-LOW transition of the data line while the clock is HIGH is defined as the START condition - S. A LOW-to-HIGH transition of the data line while the clock is HIGH is defined as the STOP condition - P (see Figure 14). SDA SDA SCL S START condition P STOP condition SCL mbc622 Fig 14. Definition of START and STOP conditions 8.3 System configuration A device generating a message is a transmitter, a device receiving a message is the receiver. The device that controls the message is the master and the devices which are controlled by the master are the slaves (see Figure 15). PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 24 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates MASTER TRANSMITTER/ RECEIVER SDA SCL SLAVE RECEIVER SLAVE TRANSMITTER/ RECEIVER MASTER TRANSMITTER MASTER TRANSMITTER/ RECEIVER mga807 Fig 15. System configuration 8.4 Acknowledge The number of data bytes transferred between the START and STOP conditions from transmitter to receiver is unlimited. Each byte of eight bits is followed by an acknowledge cycle. • A slave receiver, which is addressed, must generate an acknowledge after the reception of each byte. • A master receiver must generate an acknowledge after the reception of each byte that has been clocked out of the slave transmitter. • The device that acknowledges must pull-down the SDA line during the acknowledge clock pulse, so that the SDA line is stable LOW during the HIGH period of the acknowledge related clock pulse (set-up and hold times must be taken into consideration). • A master receiver must signal an end of data to the transmitter by not generating an acknowledge on the last byte that has been clocked out of the slave. In this event, the transmitter must leave the data line HIGH to enable the master to generate a STOP condition. Acknowledgement on the I2C-bus is illustrated in Figure 16. data output by transmitter not acknowledge data output by receiver acknowledge SCL from master S START condition clock pulse for acknowledgement mbc602 1 2 8 9 Fig 16. Acknowledgement of the I2C-bus PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 25 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 8.5 I2C-bus controller The PCA85162 acts as an I2C-bus slave receiver. It does not initiate I2C-bus transfers or transmit data to an I2C-bus master receiver. The only data output from the PCA85162 are the acknowledge signals of the selected devices. Device selection depends on the I2C-bus slave address, on the transferred command data and on the hardware subaddress. In single device applications, the hardware subaddress inputs A0, A1, and A2 are normally tied to VSS which defines the hardware subaddress 0. In multiple device applications A0, A1, and A2 are tied to VSS or VDD using a binary coding scheme, so that no two devices with a common I2C-bus slave address have the same hardware subaddress. 8.6 Input filters To enhance noise immunity in electrically adverse environments, RC low-pass filters are provided on the SDA and SCL lines. 8.7 I2C-bus protocol Two I2C-bus slave addresses (0111 000 and 0111 001) are used to address the PCA85162. The entire I2C-bus slave address byte is shown in Table 16. Table 16. Bit I2C slave address byte Slave address 7 MSB 0 1 1 1 0 0 SA0 6 5 4 3 2 1 0 LSB R/W The PCA85162 is a write-only device and will not respond to a read access, therefore bit 0 should always be logic 0. Bit 1 of the slave address byte, that a PCA85162 will respond to, is defined by the level tied to its SA0 input (VSS for logic 0 and VDD for logic 1). Having two reserved slave addresses allows the following on the same I2C-bus: • Up to 16 PCA85162 for very large LCD applications • The use of two types of LCD multiplex drive The I2C-bus protocol is shown in Figure 17. The sequence is initiated with a START condition (S) from the I2C-bus master which is followed by one of two possible PCA85162 slave addresses available. All PCA85162 whose SA0 inputs correspond to bit 0 of the slave address respond by asserting an acknowledge in parallel. This I2C-bus transfer is ignored by all PCA85162 whose SA0 inputs are set to the alternative level. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 26 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates R/W slave address S 011100A0AC 0 1 byte acknowledge by all addressed PCA85162 acknowledge by A0, A1 and A2 selected PCA85162 only S COMMAND A DISPLAY DATA A P n ≥ 1 byte(s) n ≥ 0 byte(s) update data pointers and if necessary, subaddress counter 013aaa057 Fig 17. I2C-bus protocol After an acknowledgement, one or more command bytes follow that define the status of each addressed PCA85162. The last command byte sent is identified by resetting its most significant bit, continuation bit C (see Figure 18). The command bytes are also acknowledged by all addressed PCA85162 on the bus. MSB C REST OF OPCODE LSB msa833 Fig 18. Format of command byte After the last command byte, one or more display data bytes may follow. Display data bytes are stored in the display RAM at the address specified by the data pointer and the subaddress counter. Both data pointer and subaddress counter are automatically updated and the data directed to the intended PCA85162 device. An acknowledgement, after each byte is asserted, only by the PCA85162s that are addressed via address lines A0, A1, and A2. After the last display byte, the I2C-bus master asserts a STOP condition (P). Alternately a START may be asserted to restart an I2C-bus access. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 27 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 9. Internal circuitry VDD VDD SA0 VSS VDD VSS CLK SCL VSS VDD VSS OSC VSS VDD SDA SYNC VSS VDD VSS A0, A1, A2 VSS VLCD BP0, BP1, BP2, BP3 VSS VLCD VLCD S0 to S31 VSS 001aac269 VSS Fig 19. Device protection circuits PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 28 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 10. Limiting values CAUTION Static voltages across the liquid crystal display can build up when the LCD supply voltage (VLCD) is on while the IC supply voltage (VDD) is off, or vice versa. This may cause unwanted display artifacts. To avoid such artifacts, VLCD and VDD must be applied or removed together. Table 17. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol Parameter VDD VLCD VI supply voltage LCD supply voltage input voltage on each of the pins CLK, SDA, SCL, SYNC, SA0, OSC, A0 to A2 on each of the pins S0 to S31, BP0 to BP3 Conditions Min 0.5 0.5 0.5 Max +6.5 +9.0 +6.5 Unit V V V VO II IO IDD IDD(LCD) ISS Ptot Po VESD output voltage input current output current supply current LCD supply current ground supply current total power dissipation output power electrostatic discharge voltage 0.5 10 10 50 50 50 - +9.0 +10 +10 +50 +50 +50 400 100 2000 300 1000 200 +150 +95 V mA mA mA mA mA mW mW V V V mA C C HBM MM CDM [1] [2] [3] [4] [5] 55 40 Ilu Tstg Tamb [1] [2] [3] [4] [5] latch-up current storage temperature ambient temperature operating device Pass level; Human Body Model (HBM), according to Ref. 6 “JESD22-A114”. Pass level; Machine Model (MM), according to Ref. 7 “JESD22-A115”. Pass level; Charged-Device Model (CDM), according to Ref. 8 “JESD22-C101”. Pass level; latch-up testing according to Ref. 9 “JESD78” at maximum ambient temperature (Tamb(max)). According to the NXP store and transport requirements (see Ref. 11 “NX3-00092”) the devices have to be stored at a temperature of +8 C to +45 C and a humidity of 25 % to 75 %. For long term storage products deviant conditions are described in that document. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 29 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 11. Static characteristics Table 18. Static characteristics VDD = 1.8 V to 5.5 V; VSS = 0 V; VLCD = 2.5 V to 8.0 V; Tamb = 40 C to +95 C; unless otherwise specified. Symbol Supplies VDD VLCD IDD IDD(LCD) Logic[5] VP(POR) VIL power-on reset supply voltage LOW-level input voltage on pins CLK, SYNC, OSC, A0 to A2, SA0, SCL, SDA on pins CLK, SYNC, OSC, A0 to A2, SA0, SCL, SDA output sink current; VOL = 0.4 V; VDD = 5 V on pins CLK and SYNC on pin SDA IOH(CLK) IL HIGH-level output current on pin CLK leakage current output source current; VOH = 4.6 V; VDD = 5 V VI = VDD or VSS; on pins CLK, SCL, SDA, A0 to A2 and SA0 VI = VDD [8] [6][7] Parameter supply voltage LCD supply voltage supply current LCD supply current Conditions Min 1.8 [1] Typ 1.3 - Max 5.5 8.0 20 60 1.6 0.3VDD Unit V V A A V V 2.5 1.0 VSS fclk(ext) = 1 536 Hz fclk(ext) = 1 536 Hz [2][3] [2][4] VIH HIGH-level input voltage 0.7VDD - VDD V IOL LOW-level output current 1 3 1 1 - +1 mA mA mA A IL(OSC) CI  VO RO leakage current on pin OSC input capacitance output voltage variation output resistance 1 100 [9] - +1 7 +100 A pF mV LCD outputs on pins BP0 to BP3 and S0 to S31 VLCD = 5 V on pins BP0 to BP3 on pins S0 to S31 [1] [2] [3] [4] [5] [6] [7] [8] [9] VLCD > 3 V for 1⁄3 bias. LCD outputs are open-circuit; inputs at VSS or VDD; external clock with 50 % duty factor; I2C-bus inactive. For typical values, see Figure 20. For typical values, see Figure 21. The I2C-bus interface of PCA85162 is 5 V tolerant. When tested, I2C pins SCL and SDA have no diode to VDD and may be driven to the VI limiting values given in Table 17 (see Figure 19 as well). Propagation delay of driver between clock (CLK) and LCD driving signals. Periodically sampled, not 100 % tested. Outputs measured one at a time. - 1.5 6.0 - k k PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 30 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 5 IDD (μA) 4 001aal523 3 2 1 0 2 3 4 5 VDD (V) 6 Tamb = 30 C; 1:4 multiplex drive mode; VLCD = 6.5 V; fclk(ext) = 1.536 kHz; all RAM written with logic 1; no display connected; I2C-bus inactive. Fig 20. Typical IDD with respect to VDD 20 IDD(LCD) (μA) 16 001aal524 12 8 4 0 3 5 7 VLCD (V) 9 Tamb = 30 C; 1:4 multiplex drive mode; fclk(ext) = 1.536 kHz; all RAM written with logic 1; no display connected. Fig 21. Typical IDD(LCD) with respect to VLCD PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 31 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 12. Dynamic characteristics Table 19. Dynamic characteristics VDD = 1.8 V to 5.5 V; VSS = 0 V; VLCD = 2.5 V to 8.0 V; Tamb = 40 C to +95 C; unless otherwise specified. Symbol Clock fclk(int) fclk(ext) ffr tclk(H) tclk(L) internal clock frequency external clock frequency frame frequency HIGH-level clock time LOW-level clock time internal clock external clock [1] Parameter Conditions Min 1 920 960 80 40 60 60 1 Typ 2640 110 30 - Max 3600 4800 150 200 30 Unit Hz Hz Hz Hz s s ns s s Synchronization tPD(SYNC_N) SYNC propagation delay tSYNC_NL tPD(drv) I2C-bus[3] Pin SCL fSCL tLOW tHIGH Pin SDA tSU;DAT tHD;DAT tBUF tSU;STO tHD;STA tSU;STA tr tf Cb tw(spike) [1] [2] [3] SYNC LOW time driver propagation delay VLCD = 5 V [2] - SCL clock frequency LOW period of the SCL clock HIGH period of the SCL clock data set-up time data hold time bus free time between a STOP and START condition set-up time for STOP condition hold time (repeated) START condition set-up time for a repeated START condition rise time of both SDA and SCL signals fSCL = 400 kHz fSCL < 125 kHz fall time of both SDA and SCL signals capacitive load for each bus line spike pulse width on the I2C-bus 1.3 0.6 100 0 1.3 0.6 0.6 0.6 - - 400 0.3 1.0 0.3 400 50 kHz s s ns ns s s s s s s s pF ns Pins SCL and SDA Typical output duty factor: 50 % measured at the CLK output pin. Not tested in production. All timing values are valid within the operating supply voltage and ambient temperature range and are referenced to VIL and VIH with an input voltage swing of VSS to VDD. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 32 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 1 / fclk tclk(H) CLK tclk(L) 0.7 VDD 0.3 VDD SYNC tPD(SYNC_N) tSYNC_NL 0.7 VDD 0.3 VDD 10 % BPn, Sn tPD(drv) 80 % 10 % 013aaa298 Fig 22. Driver timing waveforms SDA tBUF tLOW tf SCL tHD;STA tr tHD;DAT tHIGH tSU;DAT SDA tSU;STA tSU;STO mga728 Fig 23. I2C-bus timing waveforms PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 33 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 13. Application information 13.1 Cascaded operation Large display configurations of up to 16 PCA85162 can be recognized on the same I2C-bus by using the 3-bit hardware subaddress (A0, A1, and A2) and the programmable I2C-bus slave address (SA0). Table 20. Cluster 1 Addressing cascaded PCA85162 Bit SA0 0 Pin A2 0 0 0 0 1 1 1 1 2 1 0 0 0 0 1 1 1 1 Pin A1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Pin A0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Device 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 When cascaded PCA85162 are synchronized, they can share the backplane signals from one of the devices in the cascade. Such an arrangement is cost-effective in large LCD applications since the backplane outputs of only one device need to be through-plated to the backplane electrodes of the display. The other PCA85162 of the cascade contribute additional segment outputs, but their backplane outputs are left open-circuit (see Figure 24). PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 34 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates VDD SDA SCL SYNC CLK OSC A0 VLCD VDD tr 2Cb SDA SCL SYNC CLK OSC A1 A2 VLCD 32 segment drives PCA85162 (2) BP0 to BP3 (open-circuit) SA0 VSS LCD PANEL R≤ VDD VLCD 32 segment drives HOST MICROPROCESSOR/ MICROCONTROLLER PCA85162 (1) 4 backplanes BP0 to BP3 VSS A0 A1 A2 SA0 VSS 013aaa058 (1) Is master (OSC connected to VSS). (2) Is slave (OSC connected to VDD). Fig 24. Cascaded PCA85162 configuration The SYNC line is provided to maintain the correct synchronization between all cascaded PCA85162. Synchronization is guaranteed after a power-on reset. The only time that SYNC is likely to be needed is if synchronization is accidentally lost (e.g. by noise in adverse electrical environments or by defining a multiplex drive mode when PCA85162 with different SA0 levels are cascaded). SYNC is organized as an input/output pin. The output selection is realized as an open-drain driver with an internal pull-up resistor. A PCA85162 asserts the SYNC line at the onset of its last active backplane signal and monitors the SYNC line at all other times. If synchronization in the cascade is lost, it is restored by the first PCA85162 to assert SYNC. The timing relationship between the backplane waveforms and the SYNC signal for the various drive modes of the PCA85162 are shown in Figure 25. The contact resistance between the SYNC on each cascaded device must be controlled. If the resistance is too high, the device is not able to synchronize properly; this is particularly applicable to chip-on-glass applications. The maximum SYNC contact resistance allowed for the number of devices in cascade is given in Table 21. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 35 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates SYNC contact resistance Maximum contact resistance 6 k 2.2 k 1.2 k 700  Table 21. 2 3 to 5 6 to 10 10 to 16 Number of devices The PCA85162 can always be cascaded with other devices of the same type or conditionally with other devices of the same family. This allows optimal drive selection for a given number of pixels to display. Figure 22 and Figure 25 show the timing of the synchronization signals. Tfr = 1 ffr BP0 SYNC (a) static drive mode. BP0 (1/2 bias) BP0 (1/3 bias) SYNC (b) 1:2 multiplex drive mode. BP0 (1/3 bias) SYNC (c) 1:3 multiplex drive mode. BP0 (1/3 bias) SYNC (d) 1:4 multiplex drive mode. mgl755 Fig 25. Synchronization of the cascade for the various PCA85162 drive modes In a cascaded configuration only one PCA85162 master must be used as clock source. All other PCA85162 in the cascade must be configured as slave such that they receive the clock from the master. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 36 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates If an external clock source is used, all PCA85162 in the cascade must be configured such as to receive the clock from that external source (pin OSC connected to VDD). Thereby it must be ensured that the clock tree is designed such that on all PCA85162 the clock propagation delay from the clock source to all PCA85162 in the cascade is as equal as possible since otherwise synchronization artefacts may occur. In mixed cascading configurations, care has to be taken that the specifications of the individual cascaded devices are met at all times. 14. Test information 14.1 Quality information This product has been qualified in accordance with the Automotive Electronics Council (AEC) standard Q100 - Failure mechanism based stress test qualification for integrated circuits, and is suitable for use in automotive applications. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 37 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 15. Package outline TSSOP48: plastic thin shrink small outline package; 48 leads; body width 6.1 mm SOT362-1 D E A X c y HE vMA Z 48 25 Q A2 A1 pin 1 index Lp L (A 3) A θ 1 e bp 24 wM detail X 0 2.5 scale 5 mm DIMENSIONS (mm are the original dimensions). UNIT mm A max. 1.2 A1 0.15 0.05 A2 1.05 0.85 A3 0.25 bp 0.28 0.17 c 0.2 0.1 D (1) 12.6 12.4 E (2) 6.2 6.0 e 0.5 HE 8.3 7.9 L 1 Lp 0.8 0.4 Q 0.50 0.35 v 0.25 w 0.08 y 0.1 Z 0.8 0.4 θ 8o o 0 Notes 1. Plastic or metal protrusions of 0.15 mm maximum per side are not included. 2. Plastic interlead protrusions of 0.25 mm maximum per side are not included. OUTLINE VERSION SOT362-1 REFERENCES IEC JEDEC MO-153 JEITA EUROPEAN PROJECTION ISSUE DATE 99-12-27 03-02-19 Fig 26. Package outline SOT362-1 (TSSOP48) PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 38 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 16. Handling information All input and output pins are protected against ElectroStatic Discharge (ESD) under normal handling. When handling Metal-Oxide Semiconductor (MOS) devices ensure that all normal precautions are taken as described in JESD625-A, IEC 61340-5 or equivalent standards. 17. Soldering of SMD packages This text provides a very brief insight into a complex technology. A more in-depth account of soldering ICs can be found in Application Note AN10365 “Surface mount reflow soldering description”. 17.1 Introduction to soldering Soldering is one of the most common methods through which packages are attached to Printed Circuit Boards (PCBs), to form electrical circuits. The soldered joint provides both the mechanical and the electrical connection. There is no single soldering method that is ideal for all IC packages. Wave soldering is often preferred when through-hole and Surface Mount Devices (SMDs) are mixed on one printed wiring board; however, it is not suitable for fine pitch SMDs. Reflow soldering is ideal for the small pitches and high densities that come with increased miniaturization. 17.2 Wave and reflow soldering Wave soldering is a joining technology in which the joints are made by solder coming from a standing wave of liquid solder. The wave soldering process is suitable for the following: • Through-hole components • Leaded or leadless SMDs, which are glued to the surface of the printed circuit board Not all SMDs can be wave soldered. Packages with solder balls, and some leadless packages which have solder lands underneath the body, cannot be wave soldered. Also, leaded SMDs with leads having a pitch smaller than ~0.6 mm cannot be wave soldered, due to an increased probability of bridging. The reflow soldering process involves applying solder paste to a board, followed by component placement and exposure to a temperature profile. Leaded packages, packages with solder balls, and leadless packages are all reflow solderable. Key characteristics in both wave and reflow soldering are: • • • • • • Board specifications, including the board finish, solder masks and vias Package footprints, including solder thieves and orientation The moisture sensitivity level of the packages Package placement Inspection and repair Lead-free soldering versus SnPb soldering PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 39 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 17.3 Wave soldering Key characteristics in wave soldering are: • Process issues, such as application of adhesive and flux, clinching of leads, board transport, the solder wave parameters, and the time during which components are exposed to the wave • Solder bath specifications, including temperature and impurities 17.4 Reflow soldering Key characteristics in reflow soldering are: • Lead-free versus SnPb soldering; note that a lead-free reflow process usually leads to higher minimum peak temperatures (see Figure 27) than a SnPb process, thus reducing the process window • Solder paste printing issues including smearing, release, and adjusting the process window for a mix of large and small components on one board • Reflow temperature profile; this profile includes preheat, reflow (in which the board is heated to the peak temperature) and cooling down. It is imperative that the peak temperature is high enough for the solder to make reliable solder joints (a solder paste characteristic). In addition, the peak temperature must be low enough that the packages and/or boards are not damaged. The peak temperature of the package depends on package thickness and volume and is classified in accordance with Table 22 and 23 Table 22. SnPb eutectic process (from J-STD-020C) Package reflow temperature (C) Volume (mm3) < 350 < 2.5  2.5 Table 23. 235 220 Lead-free process (from J-STD-020C) Package reflow temperature (C) Volume (mm3) < 350 < 1.6 1.6 to 2.5 > 2.5 260 260 250 350 to 2000 260 250 245 > 2000 260 245 245  350 220 220 Package thickness (mm) Package thickness (mm) Moisture sensitivity precautions, as indicated on the packing, must be respected at all times. Studies have shown that small packages reach higher temperatures during reflow soldering, see Figure 27. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 40 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates temperature maximum peak temperature = MSL limit, damage level minimum peak temperature = minimum soldering temperature peak temperature time 001aac844 MSL: Moisture Sensitivity Level Fig 27. Temperature profiles for large and small components For further information on temperature profiles, refer to Application Note AN10365 “Surface mount reflow soldering description”. PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 41 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 18. Abbreviations Table 24. Acronym AEC CMOS CDM DC HBM I2C IC LCD LSB MM MSB MSL PCB POR RAM RC RMS SCL SDA SMD Abbreviations Description Automotive Electronics Council Complementary Metal-Oxide Semiconductor Charged Device Model Direct Current Human Body Model Inter-Integrated Circuit Integrated Circuit Liquid Crystal Display Least Significant Bit Machine Model Most Significant Bit Moisture Sensitivity Level Printed-Circuit Board Power-On Reset Random Access Memory Resistance and Capacitance Root Mean Square Serial CLock line Serial DAta Line Surface-Mount Device PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 42 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 19. References [1] [2] [3] [4] [5] [6] [7] [8] [9] AN10365 — Surface mount reflow soldering description AN10853 — ESD and EMC sensitivity of IC IEC 60134 — Rating systems for electronic tubes and valves and analogous semiconductor devices IEC 61340-5 — Protection of electronic devices from electrostatic phenomena IPC/JEDEC J-STD-020D — Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices JESD22-A114 — Electrostatic Discharge (ESD) Sensitivity Testing Human Body Model (HBM) JESD22-A115 — Electrostatic Discharge (ESD) Sensitivity Testing Machine Model (MM) JESD22-C101 — Field-Induced Charged-Device Model Test Method for Electrostatic-Discharge-Withstand Thresholds of Microelectronic Components JESD78 — IC Latch-Up Test [10] JESD625-A — Requirements for Handling Electrostatic-Discharge-Sensitive (ESDS) Devices [11] NX3-00092 — NXP store and transport requirements [12] SNV-FA-01-02 — Marking Formats Integrated Circuits [13] UM10204 — I2C-bus specification and user manual 20. Revision history Table 25. Revision history Release date 20110616 Data sheet status Product data sheet Product data sheet Change notice Supersedes PCA85162_1 Document ID PCA85162 v.2 Modifications: PCA85162_1 • Added Section 7.10.3 20100419 PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 43 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 21. Legal information 21.1 Data sheet status Document status[1][2] Objective [short] data sheet Preliminary [short] data sheet Product [short] data sheet [1] [2] [3] Product status[3] Development Qualification Production Definition This document contains data from the objective specification for product development. This document contains data from the preliminary specification. This document contains the product specification. Please consult the most recently issued document before initiating or completing a design. The term ‘short data sheet’ is explained in section “Definitions”. The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the Internet at URL http://www.nxp.com. 21.2 Definitions Draft — The document is a draft version only. The content is still under internal review and subject to formal approval, which may result in modifications or additions. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. Short data sheet — A short data sheet is an extract from a full data sheet with the same product type number(s) and title. A short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. For detailed and full information see the relevant full data sheet, which is available on request via the local NXP Semiconductors sales office. In case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. Product specification — The information and data provided in a Product data sheet shall define the specification of the product as agreed between NXP Semiconductors and its customer, unless NXP Semiconductors and customer have explicitly agreed otherwise in writing. In no event however, shall an agreement be valid in which the NXP Semiconductors product is deemed to offer functions and qualities beyond those described in the Product data sheet. suitable for use in medical, military, aircraft, space or life support equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. NXP Semiconductors accepts no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customer’s own risk. Applications — Applications that are described herein for any of these products are for illustrative purposes only. NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products, and NXP Semiconductors accepts no liability for any assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the NXP Semiconductors product is suitable and fit for the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customer(s). Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. NXP Semiconductors does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s applications or products, or the application or use by customer’s third party customer(s). Customer is responsible for doing all necessary testing for the customer’s applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer’s third party customer(s). NXP does not accept any liability in this respect. Limiting values — Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the device. Limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the Recommended operating conditions section (if present) or the Characteristics sections of this document is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. Terms and conditions of commercial sale — NXP Semiconductors products are sold subject to the general terms and conditions of commercial sale, as published at http://www.nxp.com/profile/terms, unless otherwise agreed in a valid written individual agreement. In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NXP Semiconductors hereby expressly objects to applying the customer’s general terms and conditions with regard to the purchase of NXP Semiconductors products by customer. No offer to sell or license — Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. 21.3 Disclaimers Limited warranty and liability — Information in this document is believed to be accurate and reliable. However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. In no event shall NXP Semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Notwithstanding any damages that customer might incur for any reason whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of NXP Semiconductors. Right to make changes — NXP Semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof. Suitability for use in automotive applications — This NXP Semiconductors product has been qualified for use in automotive applications. The product is not designed, authorized or warranted to be PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 44 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates Export control — This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from national authorities. 21.4 Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. I2C-bus — logo is a trademark of NXP B.V. 22. Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com PCA85162 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved. Product data sheet Rev. 2 — 16 June 2011 45 of 46 NXP Semiconductors PCA85162 Universal LCD driver for low multiplex rates 23. Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features and benefits . . . . . . . . . . . . . . . . . . . . 1 3 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 4 Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 5 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2 6 Pinning information . . . . . . . . . . . . . . . . . . . . . . 3 6.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 7 Functional description . . . . . . . . . . . . . . . . . . . 5 7.1 Power-On Reset (POR) . . . . . . . . . . . . . . . . . . 6 7.2 LCD bias generator . . . . . . . . . . . . . . . . . . . . . 6 7.3 LCD voltage selector . . . . . . . . . . . . . . . . . . . . 6 7.3.1 Electro-optical performance . . . . . . . . . . . . . . . 8 7.4 LCD drive mode waveforms . . . . . . . . . . . . . . 10 7.4.1 Static drive mode . . . . . . . . . . . . . . . . . . . . . . 10 7.4.2 1:2 Multiplex drive mode. . . . . . . . . . . . . . . . . 11 7.4.3 1:3 Multiplex drive mode. . . . . . . . . . . . . . . . . 13 7.4.4 1:4 Multiplex drive mode. . . . . . . . . . . . . . . . . 14 7.5 Oscillator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 7.5.1 Internal clock . . . . . . . . . . . . . . . . . . . . . . . . . 15 7.5.2 External clock . . . . . . . . . . . . . . . . . . . . . . . . . 15 7.6 Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 7.7 Display register . . . . . . . . . . . . . . . . . . . . . . . . 15 7.8 Segment outputs. . . . . . . . . . . . . . . . . . . . . . . 15 7.9 Backplane outputs . . . . . . . . . . . . . . . . . . . . . 15 7.10 Display RAM . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7.10.1 Data pointer . . . . . . . . . . . . . . . . . . . . . . . . . . 18 7.10.2 Subaddress counter . . . . . . . . . . . . . . . . . . . . 18 7.10.3 RAM writing in 1:3 multiplex drive mode. . . . . 19 7.10.4 Output bank selector . . . . . . . . . . . . . . . . . . . 20 7.10.5 Input bank selector . . . . . . . . . . . . . . . . . . . . . 20 7.11 Blinking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 7.12 Command decoder . . . . . . . . . . . . . . . . . . . . . 21 7.13 Display controller . . . . . . . . . . . . . . . . . . . . . . 23 8 Characteristics of the I2C-bus . . . . . . . . . . . . 24 8.1 Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 8.2 START and STOP conditions . . . . . . . . . . . . . 24 8.3 System configuration . . . . . . . . . . . . . . . . . . . 24 8.4 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 25 8.5 I2C-bus controller . . . . . . . . . . . . . . . . . . . . . . 26 8.6 Input filters . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 8.7 I2C-bus protocol . . . . . . . . . . . . . . . . . . . . . . . 26 9 Internal circuitry. . . . . . . . . . . . . . . . . . . . . . . . 28 10 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 29 11 Static characteristics. . . . . . . . . . . . . . . . . . . . 30 12 Dynamic characteristics . . . . . . . . . . . . . . . . . 32 13 13.1 14 14.1 15 16 17 17.1 17.2 17.3 17.4 18 19 20 21 21.1 21.2 21.3 21.4 22 23 Application information . . . . . . . . . . . . . . . . . Cascaded operation. . . . . . . . . . . . . . . . . . . . Test information . . . . . . . . . . . . . . . . . . . . . . . Quality information . . . . . . . . . . . . . . . . . . . . . Package outline. . . . . . . . . . . . . . . . . . . . . . . . Handling information . . . . . . . . . . . . . . . . . . . Soldering of SMD packages . . . . . . . . . . . . . . Introduction to soldering. . . . . . . . . . . . . . . . . Wave and reflow soldering. . . . . . . . . . . . . . . Wave soldering . . . . . . . . . . . . . . . . . . . . . . . Reflow soldering . . . . . . . . . . . . . . . . . . . . . . Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . References. . . . . . . . . . . . . . . . . . . . . . . . . . . . Revision history . . . . . . . . . . . . . . . . . . . . . . . Legal information . . . . . . . . . . . . . . . . . . . . . . Data sheet status . . . . . . . . . . . . . . . . . . . . . . Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . Contact information . . . . . . . . . . . . . . . . . . . . Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 34 37 37 38 39 39 39 39 40 40 42 43 43 44 44 44 44 45 45 46 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. © NXP B.V. 2011. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Date of release: 16 June 2011 Document identifier: PCA85162