Difference between revisions of "Instrustar ISDS205A"

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m (Firmare structure added)
Line 199: Line 199:
| D0<sub>B</sub>-D7<sub>B</sub>
| D0<sub>B</sub>-D7<sub>B</sub>
| Connected to FX2 PD0-PD7.
| Connected to FX2 PD0-PD7.
|}
== Firmware ==
'''Note''': The firmware is flashed into the device permanently.
=== EEPROM layout ===
The device has a 8KB I²C EEPROM with the following layout:
<span style="background-color: orange">c2</span> <span style="background-color: lime">47 05</span> <span style="background-color: green">31 21</span> <span style="background-color: lightgreen">00 00</span> <span style="background-color: brown">04</span> <span style="background-color: yellow">XX XX XX XX XX XX .. ..</span>
Description:
{| border="0" style="font-size: smaller;" class="alternategrey sigroktable"
!Bytes
!Description
|-
| style="background-color: orange" | 0
| '''0xc2''': FX2 "c2 load" mode, i.e. VID/PID/DID are loaded from EEPROM as the firmware.
|-
| style="background-color: lime" | 1-2
| '''0x0547''': USB vendor ID (VID).
|-
| style="background-color: green" | 3-4
| '''0x2131''': USB product ID (PID).
|-
| style="background-color: lightgreen" | 5-6
| '''0x0000''': USB device ID (DID).
|-
| style="background-color: brown" | 7
| '''0x04''': FX2 configuration byte (see FX2 TRM for details).
|-
| style="background-color: yellow" | 8-1917h
| Firmware.
|-
| 1918h -1fffh
| All-0xff.
|}
|}


Revision as of 08:11, 11 July 2018

Instrustar ISDS205A
Status in progress
Channels 2
Samplerate 48MHz
Analog bandwidth 20MHz
Vertical resolution 8bit
Triggers none (SW-only)
Input impedance 1MΩ‖25pF
Memory none
Display none
Connectivity USB
Website instrustar.com

The Instrustar ISDS205A is a USB-based, 2-channel oscilloscope with an analog bandwidth of 20MS/s and 48MS/s sampling rate.

See Instrustar ISDS205A/Info for more details (such as lsusb -v output) on the device.

Hardware

  • Cypress FX2LP CY7C68013AC (USB 2.0 HS controller)
  • Analog Devices AD9288 (ADC)
  • Microchip 24LC64I (64K I²C EEPROM)
  • (2)NXP 74HC4051 (8-Channel Analog Mux)
  • NXP 74HC595D (8bit Shift Register (Serial-in to Serial or Parallel-out))
  • Oscillator GZX24.000 (24MHz crystal)
  • (4) Huike (Shenzhen) HK23F-DC5V-SHG (Reed switch)

Cypress FX2 pinout:

PD5 1-   O -56 PD4
PD6 2- -55 PD3
PD7 3- -54 PD2
GND 4- -53 PD1
CLKOUT 5- -52 PD0
VCC 6- -51 *WAKEUP
GND 7- -50 VCC
RDY0/*SLRD 8- -49 RESET#
RDY1/*SLWR 9- -48 GND
AVCC 10- -47 PA7
(24MHz crystal) XTALOUT 11- -46 PA6 (74HC595D, SHCP)
(24MHz crystal) XTALIN 12- -45 PA5 (74HC595D, STCP)
AGND 13- -44 PA4 (74HC595D, DS)
AVCC 14- -43 PA3
(USB D+) DPLUS 15- -42 PA2
(USB D-) DMINUS 16- -41 PA1
AGND 17- -40 PA0 (1kHz scope cal pin)
VCC 18- -39 VCC
GND 19- -38 CTL2
(CTL0, AD9288 ENCA/B) *IFCLK 20- -37 CTL1
RESERVED 21- -36 CTL0 (IFCLK, AD9288 ENCA/B)
(EEPROM SCL) SCL 22- -35 GND
(EEPROM SDA) SDA 23- -34 VCC
VCC 24- -33 GND
PB0 25- -32 PB7
PB1 26- -31 PB6
PB2 27- -30 PB5
PB3 28- -29 PB4

NXP 74HC595D pinout:

(upper 74HC4051D, S0) Q1 1-   O -16 VCC
(lower 74HC4051D, S0) Q2 2- -15 Q0 (upper 74HC4051D, S1)
(lower 74HC4051D, S1) Q3 3- -14 DS (FX2 PA4)
Q4 4- -13 OE# (GND)
Q5 5- -12 STCP (FX2 PA5)
Q6 6- -11 SHCP (FX2 PA6)
Q7 7- -10 MR# (VCC)
GND 8- -9 Q7S

NXP 74HC4051D (upper/lower, CH1/CH2) pinout:

Y4 1-   O -16 VCC
Y6 2- -15 Y2
Z 3- -14 Y1
Y7 4- -13 Y0
Y5 5- -12 Y3
(GND) E# 6- -11 S0 (NXP 74HC595D, Q1)
VEE 7- -10 S1 (NXP 74HC595D, Q0)
GND 8- -9 S2 (GND)
Y4 1-   O -16 VCC
Y6 2- -15 Y2
Z 3- -14 Y1
Y7 4- -13 Y0
Y5 5- -12 Y3
(GND) E# 6- -11 S0 (NXP 74HC595D, Q2)
VEE 7- -10 S1 (NXP 74HC595D, Q3)
GND 8- -9 S2 (GND)

Microchip 24LC64I pinout:

(VCC) 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 S1=VCC, S2=GND. "Normal operation, data align disabled".
DFS Tied to GND. Data format select = "offset binary" (not "twos complement").
AINA, AINB Analog input channels.
D0A-D7A Connected to FX2 PB0-PB7.
D0B-D7B Connected to FX2 PD0-PD7.

Firmware

Note: The firmware is flashed into the device permanently.

EEPROM layout

The device has a 8KB I²C EEPROM with the following layout: 

c2 47 05 31 21 00 00 04 XX XX XX XX XX XX .. ..

Description:

Bytes Description
0 0xc2: FX2 "c2 load" mode, i.e. VID/PID/DID are loaded from EEPROM as the firmware.
1-2 0x0547: USB vendor ID (VID).
3-4 0x2131: USB product ID (PID).
5-6 0x0000: USB device ID (DID).
7 0x04: FX2 configuration byte (see FX2 TRM for details).
8-1917h Firmware.
1918h -1fffh All-0xff.

Photos

  • Device, top

  • Device, bottom

  • PCB, top

  • PCB, bottom

  • 2x mux, ADC, shift-reg

  • (1 of 2) mux, ADC, shift-reg, USB, EEPROM, crystal

  • Jacks, reed switches, calibration. 2x mux, ADC, USB, crystal

Resources

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