MB2100-01A-E Single Port Embedded Emulator Debugger SPEED-BOX Operation Guide, Doc. # 002-05542 Rev. *A
10
Product Description
1.4
Debug interface cable
1.4.1
Debug interface cable
The debug interface cable is a cable with SMA coaxial connectors that uses a 1.5D-2V
(characteristic impedance 50
) wire core. Under the specifications of the MDI bus, cables having
specifications other than those attached may be used as long as the cable is a coaxial cable with a
characteristic impedance of 50
. Furthermore, because SMA coaxial connectors are standard
connectors, there is a wide range of coupling connectors and adapters for converting to other cable
specifications available commercially, allowing you to use the components that best suit the needs of
the user
system.
The connector part number and cable specifications used in the debug interface cable with the
standard specifications for this product (the included product is the 2m cable) are shown below.
Table 1-2. Connector part number and cable specifications
The maximum permissible communication speed of the MDI bus in this product for communication
from the SPEED-BOX to the MCU varies depending on the cable length. The relationship between
the cable length and the maximum permissible communication speed is shown below. The
maximum permissible communication speed from the MCU to the SPEED-BOX is 50Mbps
regardless of the cable length.
Table 1-3. Cable length and maximum permissible communication speed
The relationship between the cable length and the maximum permissible communication speed
anticipates a small margin of error, and it is not a problem if the actual total cable length is longer
than the rated values by approximately 10cm.
The actual communication speed is configured by entering the parameters on the settings screen of
the debugging software. The communication speeds that can be configured are limited by the MCU
clock frequency. See the hardware manual of the MCU for details on the parameters.
Item
Description
Manufacturer
Connector part number
HRM-200-2S-C(40)
HIROSE ELECTRIC CO., LTD.
Cable code number (UL)
1.5D-2V
Hitachi Metals, Ltd. and so on.
Cable length
Maximum permissible communication speed
(When using NRZ encoding)
2m or less
25Mbps
5m or less
12.5Mbps
10m or less
6.25Mbps
