OP-SB5GL TTL/I2C/SPI* Expansion Kit

Applicable Analyzers: LE-3500/LE-2500/LE-1500
* SPI communications is only supported by LE-3500 (V1.03 or later).
* I2C is only supported by LE-3500/LE-2500


OP-SB5GL is the interface expansion kit that has a port to measure RS-232C(V.24) and a port to measure the TTL / CMOS signal level communications. The port for TTL / CMOS supports the measurement of TTL / CMOS level communications that power supply system is from 1.8V to 5V. It is suitable for monitoring the communications between the LSI and the interface IC on the printed circuit board by directly probing into the lines. It supports the protocol of not only UART and HDLC but also I2C and SPI* on monitoring and simulating.

Furthermore, it has BURST measuring mode that captures data at all clock edges.

* SPI communications is only supported by LE-3500 (V1.03 or later).
* I2C communications is only supported by LE-3500/LE-2500.

(1) RS-232C (V.24) Measurement Port
RS-232C port, which is same as the one on the standard board.
(2) External Signal Input/Output Terminal
Output/input the external trigger signal.
(3) TTL/C-MOS Expansion Connector
Connect the TTL probe pod.
[ Internal Block ]
[ I2C mesuament]

[ Quality Test Clip ]

Operating Instructions

Operating InstructionsAfter inserting the expansion board into an analyzer (LE-3500/LE-2500), connect the communication lines to measure, using the probe pod. Since 9 kinds of  signal lines can be tested, you can measure various communications: SD, RD, RS, CS, SD_CLK, RD_CLK, external input, trigger input and trigger output. Moreover, you can set the polarity of data and the clock you wish to capture.


[ Example of Clock
Synchrounaous Communication ]

In the normal mode (USART), you can make full use of the functions of an analyzer such as the trigger function. Also, by setting the BURST mode on the analyzer, you can measure communication system (clock synchronous communication) which supplies the clock at the time of only transmitting data. That makes it possible to monitor communication that the old protocol analyzers cannot measure.


By setting the I2C mode, you can test the I2C serial communications including the start sequence and stop sequence. Since the translation display is available in I2C, you can efficiently analyze the sequences of Read and Write.

<I2C Measuring Result Screen>
I2C Measuring Result Screen
<I2C Translation Screen>
I2C Translation Screen

By using LE-3500, it can monitor SPI communications, which is widely used in transferring communications.
Refer to the SPI additional specification for details.

The timing of clock and data set at “CPOL” and “CPHA” is described in above figure.

<SPI Measuring Result Screen>
SPI Measuring Result Screen

<SPI Frame Display Screen>
SPI Frame Display Screen
Display Meaning
It displays the time of receiving data./
It displays the difference of time. (Switchable by pressing [F5])
Data It displays data in HEX.

Logic Analyzer

[ I2C wave mesuament ]
Logic Analyzer
By using the logic analyzer function, you can check the data logic and the timing of capturing the clock in the waveform. Especially, the serial interface between LSI often can be a problem regarding the phase difference and the delay of the clock and data. In this case, the logic analyzer function enables you to analyze by bit timing.

Simulation / Bert

Excepting the BURST mode, using the simulation function enables you to enhance the efficiency of product development and the troubleshooting. In the I2C and SPI mode, you can simulate in both the master and the slave. Also, since the bit error rate test (BERT) is available in the normal mode (USART), you can easily test the transmission feature of the device, etc.


Analyzer LE-2500, LE-3500, LE-1500
Interface RS-232C, TTL / CMOS (for I2C and SPI*1)
Probe Signal SD (SDA/SDO) , RD (SDI) , RS (SS) , CS , EX IN , SD CLK (SCL/SCK) ,
RD CLK , Trigger IN , Trigger OUT (Length of lead:170mm)
Test function Monitor / Simulation / BERT*2
Communication speed ASYN, ASYNC-PPP, SYNC, BURST : 50bps - 2.048Mbps*3
HDLC : 50bps to 2.048Mbps*3 on standard, 115.2Kbps to 10Mbps*3 on using OPFW10G*4
SPI : 50bps to 2.048Mbps*5, 115.2Kbps to 10Mbps*5 on using OP-FW10G*6
I2C : max. 1Mbps (On simulation 50K, 100K, 200K, 384K, 417K, 1Mbps)
Signal level Selectable from 5.0V/3.3V/2.5V/1.8V of power supply system
Input Impedance 100KΩ( 0V ≤ Vin ≤ 5V) ( Acceptable input range : -1V to +7V)
Input Level Threshold Setting of 5.0V High: Min 3.5V Low: Max 1.5V
Setting of 3.3V High: Min 2.0V Low: Max 0.8V
Setting of 2.5V High: Min 1.7V Low: Max 0.7V
Setting of 1.8V High: Min 1.2V Low: Max 0.6V
Output circuit The followings are selectable*7:
OC(Open collector)with the pull-up resister of 680Ω,
OC(Open collector)without pull-up resister,
Push-pull output of CMOS
Output Level Voltage High level : Min Selectable signal level - 0.4V Low level : Max 0.5V*8
Size and Weight Probe Pod body size : 78(W) × 92(D) × 22(H) Weight : about 100g
Relay cable length : 800mm
Power Supplied from the analyzer's body
Tenperature Operation:0 to 40°C Strage:-10 to 50°C
*1: SPI communication is supported by LE-3500 only. I2C communication is supported by LE-3500/LE-2500 only.
*2: In BURST (Mode for capturing data at all clock SYNC), only the monitor mode is supported.
I2C and SPI do not have the BERT function.
*3: Applied in the half duplex on LE-3500. It depends on the capability of analyzer.
*4: Applied in the half duplex. In the full duplex, it is 5Mbps at Max.
*5: MAX 5Mbps(Monitor) or 2.048Mbps(Simulation), when the continuous transfer speed is less than 1K bytes.
*6: Applied in the monitor mode. In the simulation mode, the speed is up to 5Mbps.
*7: Set from the analyzer. CMOS outputting is recommended on simulation of which speed is more than 2Mbps.
*8: Applied when the current is 4mA.