Sysclk AX-Pro
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The Sysclk AX-Pro is a USB-based, 8-channel logic analyzer with up to 24MHz sampling rate, with 1 additional analog channel (theoretically 2, but only one of them can be used at a time; 3MHz analog bandwidth).
It is a clone of the CWAV USBee AX-Pro.
In sigrok, we use the open-source fx2lafw firmware for this logic analyzer.
Note: fx2lafw currently doesn't support switching between the two possible analog channels, ACH2 will be used unconditionally.
See Sysclk AX-Pro/Info for some more details (such as lsusb -v output) on the device.
Hardware
- Main chip: Cypress CY7C68013A-56LTXC (FX2LP)
- I2C EEPROM: Atmel ATML125 24C02N SU27 D
- Auxiliary 8051 chip: STC STC15F104E (purpose is unknown)
- Supply voltage regulator: Advanced Monolithic Systems AMS1117-3.3
- Reference voltage regulator: Advanced Monolithic Systems AMS1117-2.851218
- Analog-to-Digital converter: Texas Instruments TLC5510I
- Analog input amplifiers: Analog Devices AD8065 (SMD marking "HRA")
- Analog amplifiers negative supply: Texas Instruments LMC7660
- Some operational amplifiers: Texas Instruments LM358
- Analog channel switching relay: TQ2-2V
- Crystal: 24MHz
The analog channels are multiplexed by relay or solid-state IC to one ADC.
FX2LP pin mappings
| | |#|Pin|Destination|Remark| |01|RDY0/SLRD|TRIG|socket pin| |13|IFCLK|GND|grounded| |18..25|PB0..7|DCH0..7|digital input| |30|CTL1/FLAGB|CLK|socket pin| |31|CTL2/FLAGC|ADC_CLK|ADC clock input| |33|PA0|relay|multiplexing ACH1/ACH2| |35|PA2|DCH1 GND|can be isolated from GND and act as aux socket pin| |36|PA3|DCH2 GND|can be isolated from GND and act as aux socket pin| |38|PA5|STC_P3.1|aux 8051 chip| |39|PA6|STC_P3.3|aux 8051 chip| |42|RESET#|STC_P3.2|aux 8051 chip| |44|WAKEUP|NC|not connected| |45..52|PD0..7|ADC_D1..8|ADC data output|
Photos
Device, top
PCB, top
PCB, bottom
Protocol
Since we use the open-source fx2lafw firmware for this device, we don't need to know the protocol.