MIKROE-2743 Datasheet by MikroElektronika

@Mimilelmmka DEVELOPMENI TOOLS ICOMPIlEHS | aooxs x mm m m m, : ME[,~'1 r V um ‘ V . UT-L 7-556 R dlck
UT-L 7-SEG R click
PID: MIKROE-2743
Addadouble7segmentdisplaytoyournextproject.
UT‐L7‐SEGRclickcarriestwoSMDultrathin(3.1mm)LED7‐SEGdisplaysandtheMAX6969constant‐
currentLEDdriverfromMaximIntegrated.Theclickisdesignedtorunoneither3.3Vor5Vpower
supply.ItcommunicateswiththetargetmicrocontrolleroverSPIinterface.
outer dlmansmns: 2ch x11.§0x2.1mm Emimng calm: RED mum seven segmem LED display Digit n-tgm: 14.22mm Low pow... consumption uu 775“: a click
Displayfeatures
Howtheclickworks
The 7 segment displays are interfaced to the MCU over the MAX6969 16-port, constant-current
LED driver IC.
It uses the common 4-wire serial bus for communication with MCU itself (LE, SCK, SDO, SDI
on mikroBUS™ pin socket).
There is an additional OE (output enable) pin which is used to control the output driver state
(enabled/disabled). Since it is the PWM output pin on the mikroBUS™ by default, the LED
segments light intensity could be controlled by software too.
MAX6969driverfeatures
The MAX6969 uses the industry-standard, shift-register-plus-latch-type serial interface.
The driver accepts data shifted into a 16-bit shift register using data input DIN and clock input
CLK. Input data appears at the DOUT output 16 clock cycles later to allow cascading of
multiple MAX6969s. So, the IC allows you to connect multiple click boards™ - for applications
that require more than two seven segment displays, such as digital clocks, temperature sensors,
etc.
mikm" BUS
Specifications
TypeLEDSegment
ApplicationsDisplayingdigitsandlettersontwo7segmentdisplays
DisplaysDSMSeriesUltraThinSurfaceMountSingleDigit7‐SegmentLEDDisplay
On‐boardmodulesMAX69696‐Port,5.5VConstant‐CurrentLEDDriver
KeyFeaturesExcellentcharacterappearance,lowpowerconsumption
InterfaceGPIO,SPI
InputVoltage3.3Vor5V
ClickboardsizeL(57.15x25.4mm)
Pinoutdiagram
This table shows how the pinout on UT-L 7-SEG R click corresponds to the pinout on the
mikroBUS™ socket (the latter shown in the two middle columns).
NotesPin
PinNotes
NC
1ANPWM16OEPWMcontroloflightintensity
NC
2RSTINT15NC
Load‐EnableinputLE3CSTX14NC
Clockinput
SCK4SCKRX13NC
SerialDataOutput
SDO5MISOSCL12NC
SerialDataInput
SDI6MOSISDA11NC
Powersupply
+3.3V73.3V5V10+5VPowersupply
GroundGND8GNDGND9GNDGround
Jumpersandsettings
DesignatorNameDefault
Position
Default
OptionDescription
JP1PRW.SEL.Down3V3PowerSupplyVoltageSelection3V3/5V,down
position3V3,upposition5V
Programming
Code examples for UT-L 7-SEG R click, written for MikroElektronika hardware and compilers
are available on Libstock.
Codesnippet
The following code snippet counts down from 99 to 0 on the displays of the UT-L 7-SEG R
click.
01 sbit MAX6969_LE_PIN at RC2_bit;
02 sbit MAX6969_LE_PIN_Direction at TRISC2_bit;
03
04 uint16_t pwmPeriod;
05 static const uint8_t minus_char = 0x40;
06
07 void systemInit()
08 {
09 AD1PCFG = 0xFFFF;
10 MAX6969_LE_PIN_Direction = 0;
11 SPI3_Init();
12 pwmPeriod = PWM_Init(5000, 1, 1, 2);
13 PWM_Start(1);
14 PWM_Set_Duty(pwmPeriod/10, 1);
15
16 }
17
18 void MAX6969_Chip_Select()
19 {
20 MAX6969_LE_PIN = 1;
21 asm nop
22 asm nop
23 asm nop
24 MAX6969_LE_PIN = 0;
25 }
26
27 static void U7SEG_Write(uint8_t number)
28 {
29 char numbers[10] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07,
0x7F, 0x6F};
30 uint8_t tens = number / 10;
31 uint8_t ones = number % 10;
32 if (number > 99) return;
33
34 SPI_Wr_Ptr(numbers[ones]);
35 SPI_Wr_Ptr(numbers[tens]);
36 }
37
38 void main()
39 {
40 uint8_t counter;
41
42 systemInit();
43 counter = 100;
44
45 while(counter--)
46 {
47 U7SEG_Write(counter);
48 MAX6969_Chip_Select();
49 Delay_ms(500);
50 }
51
52 SPI_Wr_Ptr(minus_char);
53 SPI_Wr_Ptr(minus_char);
54 MAX6969_Chip_Select();
55 }
https://shop.mikroe.com/ut‐l‐7‐seg‐r‐click9‐6‐17