Hameg HO730

Hameg HO730

The Hameg HO730 is a communication interface for Hameg test and measurement equipment. It provides both Ethernet 10/100 (RJ-45) and USB 2.0 (device, B) connections. The vendor states that the interface can be used with scope models in the HM, HMF, HMO, HMP, and HMS series.

Hardware

For Ethernet the module uses an eZ80 chip (Z80 CPU core, with some degree of hardware support for network communication) and a Micrel PHY.

For USB the module uses an FTDI FT245 chip.

 $ lsusb -v -d 0403:ed73
 Bus 003 Device 099: ID 0403:ed73 Future Technology Devices International, Ltd HAMEG HO730 Serial Port
 Device Descriptor:
   bLength                18
   bDescriptorType         1
   bcdUSB               2.00
   bDeviceClass            0 (Defined at Interface level)
   bDeviceSubClass         0 
   bDeviceProtocol         0 
   bMaxPacketSize0         8
   idVendor           0x0403 Future Technology Devices International, Ltd
   idProduct          0xed73 HAMEG HO730 Serial Port
   bcdDevice            4.00
   iManufacturer           1 HAMEG Instruments
   iProduct                2 Hameg HO730
   iSerial                 3 014691501
   bNumConfigurations      1
   Configuration Descriptor:
     bLength                 9
     bDescriptorType         2
     wTotalLength           32
     bNumInterfaces          1
     bConfigurationValue     1
     iConfiguration          0 
     bmAttributes         0xe0
       Self Powered
       Remote Wakeup
     MaxPower                0mA
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        0
       bAlternateSetting       0
       bNumEndpoints           2
       bInterfaceClass       255 Vendor Specific Class
       bInterfaceSubClass    255 Vendor Specific Subclass
       bInterfaceProtocol    255 Vendor Specific Protocol
       iInterface              2 Hameg HO730
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x81  EP 1 IN
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0040  1x 64 bytes
         bInterval               0
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x02  EP 2 OUT
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0040  1x 64 bytes
         bInterval               0
 Device Status:     0x0001
   Self Powered

Identified chips on the PCB:

• eZ80F91NA050SG (eZ80 MCU)
• Flash memory (near eZ80, for MCU firmware, covered by the version sticker)
• Voltage regulator
• KSZ8721BL (Micrel PHY)
• FTDI FT245BL (USB connectivity)
• Microwire(?) flash memory (near FTDI)
• 2x TI LC02A (7402 quad NOR gates? chip select logic? backplane glue?)

Photos

• 

  Connectors view

• 

  PCB, top side

• 

  PCB, bottom side