Hameg HO732

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Hameg HO732

The HO732 is a communication interface for Rohde&Schwarz test and measurement equipment. It provides both Ethernet (RJ-45) and USB 2.0 (device, B) connections. The vendor states that the interface can be used with scope/generator/source models in the HM, HMF, HMO, HMP, and HMS series.

Hardware

  • ST STM32F407ZGT6 (MCU)
  • Altera EPM570F100C5N (MAX II CPLD)
  • Micrel KSZ8721BL (10/100 Ethernet PHY)
  • SMSC USB3320C (USB PHY)
  • (not always populated) CY7C1041DV (SRAM)
  • TI LC02A (7402 quad NOR gates? chip select logic? backplane glue?)

The USB interface can be configured to either CDC or TMC.

Photos

  • Connectors view

  • PCB, top side

  • PCB, bottom side

USB CDC

shows up as ttyACM in Linux 

 $ lsusb -v -d 0aad:0117
 Bus 001 Device 010: ID 0aad:0117 Rohde & Schwarz GmbH & Co. KG 
 Device Descriptor:
   bLength                18
   bDescriptorType         1
   bcdUSB               2.00
   bDeviceClass            2 Communications
   bDeviceSubClass         0 
   bDeviceProtocol         0 
   bMaxPacketSize0        64
   idVendor           0x0aad Rohde & Schwarz GmbH & Co. KG
   idProduct          0x0117 
   bcdDevice            1.00
   iManufacturer           1 ROHDE&SCHWARZ
   iProduct                2 HO732
   iSerial                 3 VCP104xxx
   bNumConfigurations      1
   Configuration Descriptor:
     bLength                 9
     bDescriptorType         2
     wTotalLength           67
     bNumInterfaces          2
     bConfigurationValue     1
     iConfiguration          0 
     bmAttributes         0xc0
       Self Powered
     MaxPower              100mA
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        0
       bAlternateSetting       0
       bNumEndpoints           1
       bInterfaceClass         2 Communications
       bInterfaceSubClass      2 Abstract (modem)
       bInterfaceProtocol      1 AT-commands (v.25ter)
       iInterface              0 
       CDC Header:
         bcdCDC               1.10
       CDC Call Management:
         bmCapabilities       0x00
         bDataInterface          1
       CDC ACM:
         bmCapabilities       0x06
           sends break
           line coding and serial state
       CDC Union:
         bMasterInterface        0
         bSlaveInterface         1 
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x82  EP 2 IN
         bmAttributes            3
           Transfer Type            Interrupt
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0008  1x 8 bytes
         bInterval              16
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        1
       bAlternateSetting       0
       bNumEndpoints           2
       bInterfaceClass        10 CDC Data
       bInterfaceSubClass      0 Unused
       bInterfaceProtocol      0 
       iInterface              0 
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x01  EP 1 OUT
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0200  1x 512 bytes
         bInterval               0
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x81  EP 1 IN
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0200  1x 512 bytes
         bInterval               0
 Device Qualifier (for other device speed):
   bLength                10
   bDescriptorType         6
   bcdUSB               2.00
   bDeviceClass            2 Communications
   bDeviceSubClass         0 
   bDeviceProtocol         0 
   bMaxPacketSize0        64
   bNumConfigurations      1
 Device Status:     0x0001
   Self Powered

USB TMC

 $ lsusb -v -d 0aad:0117
 Bus 001 Device 011: ID 0aad:0117 Rohde & Schwarz GmbH & Co. KG 
 Device Descriptor:
   bLength                18
   bDescriptorType         1
   bcdUSB               2.00
   bDeviceClass            0 (Defined at Interface level)
   bDeviceSubClass         0 
   bDeviceProtocol         0 
   bMaxPacketSize0        64
   idVendor           0x0aad Rohde & Schwarz GmbH & Co. KG
   idProduct          0x0117 
   bcdDevice            1.00
   iManufacturer           1 ROHDE&SCHWARZ
   iProduct                2 HMP4040
   iSerial                 3 104xxx
   bNumConfigurations      1
   Configuration Descriptor:
     bLength                 9
     bDescriptorType         2
     wTotalLength           39
     bNumInterfaces          1
     bConfigurationValue     1
     iConfiguration          4 USBTMC
     bmAttributes         0xc0
       Self Powered
     MaxPower              100mA
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        0
       bAlternateSetting       0
       bNumEndpoints           3
       bInterfaceClass       254 Application Specific Interface
       bInterfaceSubClass      3 Test and Measurement
       bInterfaceProtocol      1 TMC
       iInterface              5 USB488
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x01  EP 1 OUT
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0200  1x 512 bytes
         bInterval               0
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x81  EP 1 IN
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0200  1x 512 bytes
         bInterval               0
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x82  EP 2 IN
         bmAttributes            3
           Transfer Type            Interrupt
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0002  1x 2 bytes
         bInterval               2
 Device Qualifier (for other device speed):
   bLength                10
   bDescriptorType         6
   bcdUSB               2.00
   bDeviceClass            0 (Defined at Interface level)
   bDeviceSubClass         0 
   bDeviceProtocol         0 
   bMaxPacketSize0        64
   bNumConfigurations      1
 Device Status:     0x0001
   Self Powered

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