Hantek PSO2020

Hantek PSO2020

Status
Source code	[1]
Channels	1
Samplerate	96MHz
Analog bandwidth	20MHz
Vertical resolution	8bit
Triggers	none (SW-only)
Input impedance	1MΩ‖25pF
Memory	none
Display	none
Connectivity	USB
Website	hantek.com

The Hantek PSO2020 is a USB-based, 1-channel oscilloscope with an analog bandwidth of 20MS/s and 96MS/s sampling rate. Wide input rage, from ±100mV to ±50V.

See Hantek PSO2020/Info for more details (such as lsusb -v output) about the device.

Hardware

• USB: Cypress CY7C68013A-100AXC (FX2LP) (datasheet)
• 256-byte I²C EEPROM: Microchip 24LC02BI (datasheet)
• 1x 8-channel analog multiplexer/demultiplexer (U6): NXP 74HC4051D (datasheet)
• 1A low-dropout voltage regulator (3.3V): Advanced Monolithic Systems AMS1117-3.3 (datasheet)
• ?? 2W, fixed input, isolated & unregulated dual/single output DC/DC converter: Mornsun A_S-2WR2 (A0505S-2WR2) (datasheet)
• 8-bit, 40/80/100MHz, dual ADC: Analog Devices AD9288 (datasheet)
• ?? 4x 145 MHz FastFET Op Amp: Analog Devices AD8065 (datasheet)
• Crystal: 24MHz
• 1x Photocoupler (U100): Toshiba TPL280 (datasheet)
• 1x 4.5V Relay (used for High Voltage selection - U10): NEC UD2-4.5NU (datasheet)
• 1x ±5V DC/DC Coverter (U13): INOUT A0505S (datasheet)

Microchip 24LC02BI pinout:

(Low, but not GND) A0	1-	O	-8	VCC
(GND) A1	2-		-7	WP (GND)
(GND) A2	3-		-6	SCL (FX2 SCL)
VSS	4-		-5	SDA (FX2 SDA)

Analog Devices ADS9288 pinout:

AD9288 pins	Description
S1, S2	Tied to VCC. "Data Align Enabled (data from both channels available on rising edge of Clock A. Channel B data is delayed a 1/2 clock cycle).".
DFS	Tied to GND. Data format select = "offset binary" (not "twos complement").
REF_IN_A, REF_IN_B	Tied to REF_OUT.
AINA, AINB	Analog input channels.

Cypress FX2 pinout:

FX2 pins	Description
CTL0	Connected to AD9288 ENCA, to ENCB with an inverter. and to FX2 IFCLK.
PB0-PB7	Connected to AD9288 D7A-D0A. Bit reversed! Must be reversed back in software.
PD0-PD7	Connected to AD9288 D0B-D7B.
PA0, PA1, PA5 (Inputs)	Connected to the 3 buttons
PC0, PC3, PE?, PE? (Inputs)	Connected to the front selector
PC1	Connected to S1 of the 74HC4051D mux
PC2	Connected to S0 of the 74HC4051D mux
PC4	AC/DC Selector
PA7	Voltage Selection Relay
PA6	Green LED
PE1	Front light
PE2	Red LED

Photos

• 

  Box Front

• 

  Box Back

• 

  Device

• 

  Inside Front

• 

  Inside Back

• 

  Inside Detail

• 

  Analog input section

Firmware

Note: The firmware is not flashed into the device permanently! It will be automatically "uploaded" to the Cypress FX2's SRAM every time you attach the device to a USB port.

EEPROM layout

The device has a 256-byte I²C EEPROM with the following layout:

c0 b4 04 23 60 00 00 00 91 91 91 91 8a 8a 85 85
81 81 91 91 8a 8a 85 81 81 81 81 81 91 91 91 91
8a 8a 85 85 81 81 91 91 8a 8a 85 81 81 81 81 81
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

Description:

Bytes	Description
0	0xc0: FX2 "c0 load" mode, i.e. VID/PID/DID are loaded from EEPROM (but not firmware).
1-2	0x04b4: USB vendor ID (VID).
3-4	0x6023: USB product ID (PID).
5-6	0x0000: USB device ID (DID).
7	0x00: FX2 configuration byte (see FX2 TRM for details).
8-47	Unknown. Possibly calibration data?
48-255	All-0xff.

Resources

• Vendor software and manuals