PDF《LED Driver IC》

9 November

2012 SCANNING AND DISPLAY TIMING V1 K .5 KEY SCA AN TIMIN NG

10 Nov PT6965 vember

2012 PT6965 V1.5

11 November

2012 SERIAL COMMUNICATION FORMAT The following diagram shows the PT6965 serial communication format. The DOUT Pin is an N-channel, open-drain output pin;

therefore, it is highly recommended that an external pull-up resistor (1 K? to

10 K?) must be connected to DOUT. where: twait (waiting time) ≥

1 ?s It must be noted that when the data is read, the waiting time (twait) between the rising of the eighth clock that has set the command and the falling of the first clock that has read the data is greater or equal to

1 ?s. PT6965 V1.5

12 November

2012 SWITCHING CHARACTERISTIC WAVEFORM PT6961 Switching Characteristics Waveform is given below. where: PWCLK (Clock Pulse Width) ≥

400 ns PWSTB (Strobe Pulse Width) ≥

1 ?s tsetup (Data Setup Time) ≥

100 ns thold (Data Hold Time) ≥

100 ns tCLK-STB (Clock - Strobe Time) ≥

1 ?s tTHZ (Fall Time) ≤

10 ?s tTZH (Rise Time) ≤

1 ?s tPZL (Propagation Delay Time) ≤

100 ns (5 V) fosc = Oscillation Frequency tPZL (Propagation Delay Time) ≤

200 ns (3 V) tTZL ≤

1 ?s (VDD =

5 V) tPLZ (Propagation Delay Time) ≤

300 ns (5 V) tTZL ≤

2 ?s (VDD =

3 V) tPLZ (Propagation Delay Time) ≤

600 ns (3 V) tTLZ ≤

10 ?s (VDD =

5 V) tTLZ ≤

20 ?s (VDD =

3 V) Note: Test Condition Under tTHZ (Pull low resistor =

10 K?, Loading capacitor =

300 pF tTLZ (Pull high resistor =

10 K?, Loading capacitor =

300 pF OSC STB CLK DIN Gn

90 %

10 % fosc

50 % PWCLK PWCLK tsetup thold PWST B tCLK-ST B tTLZ tTZL Sn

90 %

10 % tTHZ tTZH

90 %

10 %

90 %

10 % DOUT tPZL tPLZ PT6965 V1.5

13 November

2012 APPLICATIONS Display memory is updated by incrementing addresses. Please refer to the following diagram. The following diagram shows the waveforms when updating specific addresses. V1 R Not 1. C 2. C 3. C 4. C 5. W D .5 RECOMM tes: Command 1: Dis Command 2: Da Command 3: Ad Command 4: Dis When IC power Display RAM be MENDED splay Mode Com ata Setting Comm dress Setting Co splay Control Co is applied for the cleared during t D SOFTW mmands mands ommands mmands e first time, the co he initial setting. WARE FL ontent of the Disp

14 LOWCH play RAM is not HART defined;

thus, it is strongly sugge Nov ested that the co PT6965 vember

2012 ntents of the PT6965 V1.5

15 November

2012 SSOP

30 (300MIL) THERMAL PERFORMANCE IN STILL AIR JUNCT........