Ideofy LA-08
The Ideofy LA-08 is a USB-based, 8-channel logic analyzer with a max. samplerate of 96Msps@2ch (or 60msps@4ch, or 30msps@8ch).
See Ideofy LA-08/Info for more details (such as lsusb -vvv output) about the device.
Hardware
- CMOS EEPROM-based programmable logic device (CPLD): Altera EPM3032A TC44-10N, MAX 3000A family (datasheet)
- USB high-speed USB peripheral controller: Cypress CY7C68013A-56LFXC (FX2) (datasheet)
- 2K I2C EEPROM: Microchip 24LC02B (datasheet)
- 600mA low-dropout voltage regulator: iDESYN iD9302 (datasheet)
- 24MHz crystal: TXC 24.0
Photos
TODO.
Protocol
Starting an acquisition
To start an acquisition with a certain samplerate, a control transfer (direction: up, type: vendor-specific, request: 0xb6, with certain "value" and "index" entries) is sent to the device.
Samplerates
| Samplerate | Value | Index |
|---|---|---|
| 100kHz | 0x0006 | 0x9695 |
| 200kHz | 0x0000 | 0x9595 |
| 500kHz | 0x0000 | 0x3b3b |
| 1MHz | 0x0000 | 0x1d1d |
| 2MHz | 0x0000 | 0x0e0e |
| 5MHz | 0x0000 | 0x0505 |
| 10MHz | 0x0000 | 0x0202 |
| 15MHz | 0x0000 | 0x0101 |
| 24MHz | 0x0008 | 0x0101 |
| 30MHz | 0x0003 | 0x0101 |
Getting samples
The vendor software retrieves the samples in 0x4000 (16kB) chunks via bulk transfers (endpoint address: 0x86, i.e. endpoint 6).
Sample format
The probes (on the device housing) are numbered 1-8. They seem to have internal pull-ups, i.e. if you don't connect them to the target, their value will be high (1).
- 8 probes: Bit 7 is the value of probe 8, bit 0 is the value of probe 1.
- 4 probes: Bit 3 is the value of probe 4, bit 0 is the value of probe 1. Bits[7:4] are probes 4..1 respectively.
- 2 probes: Bit 1 is the value of probe 2, bit 0 is the value of probe 1. Bits[7:6], bits[5:4], and bits[3:2] are probes 2..1 respectively.
Triggers
Implemented purely in software, it seems.