Abov A31L214 Manual de usuario
Contents A31L214 Demo Board
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Contents
1Introduction ....................................................................................................................................4
2Overview ........................................................................................................................................5
3VDD Power Selection.....................................................................................................................6
4Key & LCD Display.........................................................................................................................7
5Check the current consumption modes .........................................................................................8
6How to connect an ammeter ..........................................................................................................9
7Low power Clock..........................................................................................................................10
8Low power performance demonstration on GUI ..........................................................................11
9Connection A-Link dongle and Demo board ................................................................................13
10 References...................................................................................................................................14
Revision History ....................................................................................................................................15
A31L214 Demo Board List of Figures/ List of Tables
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List of Figures
Figure 1. A31L214 Demo Board .............................................................................................................5
Figure 2. VDD Power Selection ..............................................................................................................6
Figure 3. Key assign ...............................................................................................................................7
Figure 4. Current measuring cable .........................................................................................................9
Figure 5. How to connect an ammeter ....................................................................................................9
Figure 6. Operating mode change ........................................................................................................11
List of Tables
Table 1. VDD Power Selection ................................................................................................................6
Table 2. LCD Display Mode and Key function.........................................................................................7
Table 3. Check the Run mode current ....................................................................................................8
Table 4. Check the Sleep mode current..................................................................................................8
Table 5. Check the Deep sleep mode current.........................................................................................8
Table 6. Log message output screen ....................................................................................................12
1. Introduction A31L214 Demo Board
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1 Introduction
This document is a user manual for the demo board that can check the current consumption for each
mode. Users can check the actual current by entering each mode after connecting an ammeter to this
board.
Current consumption modes that can be checked on this board are as follows.
Main/Sub Run mode (IDD1/IDD3)
Main/Sub Sleep mode (IDD2/IDD4)
Deep sleep mode 0~3 (IDD5~IDD8)
Basically, the following items were disabled to minimize the current in each of the above modes.
Clocks not selected as MCLK
RTCC block
LCD driver block
Unused peripheral clocks
Data flash power in the PMU block
For more detail, please refer to hereafter contents and the example code provided to help users
understand.
A31L12x Wake-up Guide by LPUART 2. Overview
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2 Overview
Figure 1. A31L214 Demo Board
•MCU : A31L214 ( 80LQFP-1212 )
•Supply voltage : 1.71V ~ 3.6V ( for more detail refer to the datasheet )
•Clock source
✓Internal : HIRC 32MHz/16MHz, WDTRC 40kHz
✓External : XMOSC 16MHz, XSOSC 32kHz ( low power crystal – CL: 7pF )
•LCD display : 3V, 4-digit, 4-com x 9-seg
•Key Matrix : 4-input ( PA0~PA3 )
•Support functions
✓Current consumption can be checked each by mode(IDD1~IDD8) using an ammeter.
✓Mode can be entered by key input.
✓Clock display using RTCC after power on.
✓Clock display during Deep Sleep mode 0.
•Development Tools : ARM-Keil compiler, A-LINK debugger
3. VDD Power Selection A31L214 Demo Board
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3 VDD Power Selection
Figure 2. VDD Power Selection
Table 1. VDD Power Selection
J16
VDD
Remark
Battery power
Must be needed Battery( 3V, CR2032 ) on BAT1.
External power
Must be connected Power cable on CN1.
It is possible A-Link connection for debugging in this
setting.
A-Link power
User can use A-Link power while A-Link is connected if
there is no external power source.
A31L214 Demo Board 4. Key & LCD Display
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4 Key & LCD Display
Figure 3. Key assign
Table 2. LCD Display Mode and Key function
Display Mode
Display contents and Key function
Action for Display Mode
Display Mode 0
Clock Display [hour, minute]
Power on
Display Mode 1
Clock Display [second]
Push {KEY3} once after
power on.
Display Mode 2
Calendar Display [month, day]
Push {KEY3} two times
after power on.
Display Mode 3
Function Mode Display [KEY1, KEY2]
⚫Left digit incremented by Push {KEY1}.
⚫Right digit incremented by Push {KEY2}.
⚫Push {KEY4} for enter with selected function mode.
Push {KEY3} three times
after power on.
Push {KEY1} or {KEY2}.
5. Check the current consumption modes A31L214 Demo Board
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5 Check the current consumption modes
Users can check the actual current by entering each mode after connecting an ammeter to this demo
board. Select the IDD mode to check from the list below by {KEY1}&{KEY2} and push {KEY4} to enter
the corresponding mode. And it is possible to wake up by {KEY3} key from sleep or deep sleep mode.
Table 3. Check the Run mode current
IDD mode
MCLK
Spec value (typ.)
{KEY1}&{KEY2}
IDD1 (Main run)
HIRC 32MHz
2.9 mA
[0][1]
HIRC 16MHz
1.9 mA
[1][1]
XMOSC 16MHz
1.8 mA
[2][1]
IDD3 (Sub run)
XSOSC 32kHz
13.0 uA
[2][3]
WDTRC 40kHz
[0][3]
Table 4. Check the Sleep mode current
IDD mode
MCLK
Spec value (typ.)
{KEY1}&{KEY2}
IDD2 (Main sleep)
HIRC 32MHz
1.4 mA
[0][2]
HIRC 16MHz
0.9 mA
[1][2]
XMOSC 16MHz
0.9 mA
[2][2]
IDD4 (Sub sleep)
XSOSC 32kHz
2.3 uA
[2][4]
WDTRC 40kHz
[0][4]
Table 5. Check the Deep sleep mode current
IDD mode
Conditions
Spec value (typ.)
{KEY1}&{KEY2}
IDD5 (Deep sleep mode 0)
RTCC/fSUB Off
0.43 uA
[0][5]
RTCC/fSUB On
0.99 uA
[1][5]
IDD6 (Deep sleep mode 1)
RTCC/fSUB Off
0.35 uA
[0][6]
IDD7 (Deep sleep mode 2)
RTCC/fSUB Off
0.35 uA
[0][7]
IDD8 (Deep sleep mode 3)
RTCC/fSUB Off
45 nA
[0][8]
NOTES:
1. Test conditions: VDD = 3.0V, Ta = 25℃
2. For temperature conditions and details, refer to the electrical characteristics of the datasheet.
A31L214 Demo Board 6. How to connect an ammeter
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6 How to connect an ammeter
In order to measure the current, the provided current measuring cable and a separate ammeter are
required.
The following is a cable for measuring current.
Figure 4. Current measuring cable
Connect the current measurement cable connected to the ammeter instead of the short cap at J16 as
shown below. Then it can be checked current after turning on the power.
Figure 5. How to connect an ammeter
7. Low power Clock A31L214 Demo Board
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7 Low power Clock
In this demo board, it is possible to implement a low-power clock using the RTCC embedded into the
chip. This mode uses sub oscillator, RTCC, and LCD are always on. The current is about 15uA or less.
The following is the code execution process.
①Users enter the deep sleep mode 0 by Function Mode [2][5].
②Wake-up by RTCC interrupt after holding the mode for 0.5 seconds.
③Display updated time on LCD.
④Enter the deep sleep mode 0 by s/w.
⑤The time is updated and repeat steps ② to ④ above.
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