TWR98/99. ISP Programming. Application Note. Tenx reserves the right to change or discontinue this product without notice. tenx technology inc.

Transcription

1 Advance Information TWR98/99 ISP Programming Application Note Tenx reserves the right to change or discontinue this product without notice. tenx technology inc. tenx technology, inc.

2 CONTENTS PRODUCT NAME... 2 TWR98/ TITLE... 2 TWR Series - Illustration for TWR98/99 ISP programming application...2 APPLICATION NOTE TWR98/99 ISP operation instruction Introduction to the TWR98/99 ISP mode Introduction VPP pin isolation SDA and SCL pins isolation VDD VSS Other issues to be considered Test for TWR98/ TWR99 ISP programming characteristics Test for VDD external circuit parameters Test for VPP external circuit parameters Test for SDA(PA0)external circuit parameters Test for SCL(PA1)external circuit parameters...10 Note tenx technology, inc.

3 PRODUCT NAME TWR98/99 TITLE TWR Series - Illustration for TWR98/99 ISP programming application APPLICATION NOTE 1. TWR98/99 ISP operation instruction Start TWR98/99 programming software. The software interface is shown in Figure 1. Figure 1. TWR98/99 programming software 1. Select device. The TWR98/88 ISP mode can only program MCU with ISP function. Click on DEVICE; The IC Type Select dialog box will show up. Select a MCU with ISP function, check mark the EXHV ISP program item, and click on "OK" to finish, as shown in Figure 2. Figure 2. ISP programming device selection 2 tenx technology, inc.

4 2. Load HEX file. Click on FILE, then click on LOAD FILE. The Open dialog box will show up; select HEX files and click on Open as shown in Figure 3. Figure 3. Open HEX files Once the HEX files are successfully loaded, the Loading Data OK message will show up as in Figure 4. Click on Confirm to complete. Figure 4. Complete Loading HEX file 3 tenx technology, inc.

5 3. MCU programming,once the MCU programming is selected and the HEX files loaded, click on AUTO or PROGRAM to proceed with the programming task. As soon as the programming is successfully completed, the screen will be shown as in Figure 5; click on "Confirm" to finish. Of course, the button operations on TWR98/99 can also be used to complete the programming task. Figure 5. Programming successful Message Note:The burner will perform ERASE+PROGRAM+VERIFY if AUTO command is used; while it will perform PROGRAM+VERIFY if PROGRAM command is used. Due to the above reasons, the timing for executing these two commands is very different. However, if the IC has been programmed before and the PROTECT function is selected, the programming action can only be accomplished by using the AUTO command. 2. Introduction to the TWR98/99 ISP mode 1. Introduction TWR98/99 is capable of using an In-system programming (ISP) method to program a TENX microcontroller installed on the application circuit.twr98/99 ISP mode requires 5 signals: VPP- programming voltage: as soon as the device is supplied with the programming voltage, it will enter the programming mode. SCL- programming clock: the one-way synchronization clock line from TWR98/99 to the target device. SDA- programming data: a two-way synchronization data line. VDD- power positive. VSS- power reference ground. 4 tenx technology, inc.

6 When designing an application circuit, the programming signals must be connected to the TENX device without interference. Figure 6 shows a typical application circuit capable of ISP. In order to perform ISP successfully, the application circuit must be designed according to the typical circuits. Figure 6. Typical application circuit 2. VPP pin isolation During the programming process in the ISP mode, the burner will provide a high voltage to the VPP pin of the MCU to make the MCU enter the programming state. The typical value for this VPP voltage in the ISP mode is 8.5V. Also because the VPP pin of the MCU is usually redundantly used with other functions, the following points need to be watched for during the ISP programming: a. VPP high voltage isolation. The application circuit connected to the VPP pin probably should not be connected to 8.5V directly; it is recommended to Use a Schottky diode or a current limiting resistor as the Isolation circuit: (as in Figure 6). This current limiting resistor should not be too small or a jumper can be used to disconnect the related application circuits or devices during the programming process. b. Resistive/capacitive load isolation on VPP pin The VPP pin application circuit can be resistive/capacitive load circuit. Under this condition, the capacitance must not be too large lest the VPP voltage will rise too 5 tenx technology, inc.

7 slowly and prevent the MCU from entering the programming mode causing failure. While the resistance can not be too small lest the VPP voltage will be pulled down and prevent the MCU from entering the programming mode causing failure. 3. SDA and SCL pins isolation The SDA and SCL pins must be isolated from the application circuit to prevent the programming signals from interfered by the application circuit. SDA is the one-way synchronization clock line from TWR98/99 to the target device. SCL is a two-way synchronization data line. If the application circuit needs to use these pins, it should be noted that the design of the application circuit should not alter the voltage level and the switching speed of these signals. An isolation circuit can be built as in Figure 6. It should be noted that the ground capacitance for SDA/SCL should not be too large during actual application lest it alters the transmitted signals and cause data error. 4. VDD During the programming process in the ISP mode, the application circuit will also draw power from TWR98/99. In general, the typical value of the VDD voltage in a ISP programming state is 3.45V. Therefore, it must be noted that other power supply to the application circuit should be disconnected or isolated lest the two voltage levels will produce conflict. Also, it must be noted that the load of the application circuit should not be too big lest the VDD voltage will be pulled down and cause programming failure. 5. VSS Power reference ground. The VSS voltage level must be identical to that in the application circuit.. 6. Other issues to be considered a. b. ISP signal lines should be kept as short as possible to ensure the voltage level and the switching speed of the ISP signal so that the MCU can be programmed successfully. The hardware parameters of TWR98 and TWR99 are slightly different. In terms of the pull-up resistors on the two communication lines, SDA and SCL, which have larger impact on the ISP function, the TWR99 pull-up resistors on these two lines are 4.7K Ohm while those for TWR98 are 10K Ohm. Another difference lies in that TWR99 provides IC Socket method for programming and for which there are adaptor boards and cabling built inside it. Therefore, the ISP programming result from using these two burners under the same condition may be different. 6 tenx technology, inc.

8 3. Test for TWR98/ TWR99 ISP programming characteristics The following are the relevant parameters for tests using TWR98/99 and TM57FLA80 under the ISP mode. In all tests, only single line characteristics are tested; the other part of lines which are not mentioned are left open. The purpose of these related parameters is to provide a rough quantitative reference point for the related circuits of customers design and ISP applications. Because of the complexity of the application, different MCU and different circuit combinations all can produce impact on the following parameters; please pay particular attention to them. Additionally, all the data listed below are the limit values. Customers need to reserve some margins in the actual applications. 1. Test for VDD external circuit parameters VDD load capacity (only test load circuit is connected during programming; all other pins are left open). Test is OK when R>100 Ohm. TWR98 VDD capacitive load capacity (only test load circuit is connected during programming; all other pins are left open). This circuit tests OK when C<470uF. TWR99 VDD capacitive load capacity (only test load circuit is connected during programming; all other pins are left open). This circuit tests OK when C<3.8uF. Please refer to Note 1 7 tenx technology, inc.

9 2. Test for VPP external circuit parameters VPP load capacity (only test load circuit is connected during programming; all other pins are left open). Test is OK when R>70K Ohm VPP capacitive load capacity (only test load circuit is connected during programming; all other pins are left open). This circuit tests OK when C<1.8uF. VPP typical application circuit test (RESET PIN), Test is OK if R3 is larger than 4.7K Ohm 8 tenx technology, inc.

10 3. Test for SDA(PA0)external circuit parameters SDA (PA0) capacitive load capacity (only test load circuit is connected during burning; all other pins are left open). This circuit tests OK when C=<100pF. SDA (PA0) resistive load capacity (only test load circuit is connected during burning; all other pins are left open). Test is OK if R is larger than 29K Ohm. SDA (PA0) typical application circuit test (ADC PIN), (only test load circuit is connected during burning; all other pins are left open). 9 tenx technology, inc.

11 Test data are shown in the following table: PA0 without a serial resistor PA0 with a 0R resistor PA0 with a 470R resistor C1 PROGRAM VERIFY PROGRAM VERIFY PROGRAM VERIFY -- OK OK OK OK OK OK 101 OK OK OK OK OK OK 102 OK FAIL FAIL FAIL OK OK 103 FAIL FAIL FAIL FAIL FAIL FAIL 104 FAIL FAIL FAIL FAIL FAIL FAIL 4. Test for SCL(PA1)external circuit parameters SCL (PA1) capacitive load capacity (only test load circuit is connected during burning; all other pins are left open). This circuit tests OK when C=<1000pF. SCL (PA1) resistive load capacity (only test load circuit is connected during burning; all other pins are left open). Test is OK if R is larger than 100 Ohm. SCL (PA1) typical application circuit test (ADC PIN), (only test load circuit is connected during burning; all other pins are left open) 10 tenx technology, inc.

12 Test data are shown in the following table: PA1 without a serial resistor PA with a 0R resistor PA1 with a 470R resistor C2 PROGRAM VERIFY PROGRAM VERIFY PROGRAM VERIFY -- OK OK OK OK OK OK 101 OK OK OK OK OK OK 102 OK OK OK OK OK OK 103 FAIL FAIL FAIL FAIL OK OK 104 FAIL FAIL FAIL FAIL OK OK 11 tenx technology, inc.

13 Note1 The design parameters for both TWR98 and TWR99 are almost exactly identical. However, those connection circuit related to SOCKET inside of TWR99 will decrease the ISP burning parameters somewhat. (as shown in the following graph). If customers desire an ISP burning effect that is identical to TWR98, they can bring out the burning signals directly from P1 of TWR99 and do not need to make the connection from SOCKET (the arrangement of P1 pin is identical to TWR98 PROGRAM PORT). P1 12 tenx technology, inc.