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4.2 BGMA UART Interface
The UART interface is mainly used between BGMA and MCU board. BGMA sends command to
MCU by UART, and receives the MCU feedback by UART too.
The speed of UART communication is related to UART baud rate. Following table lists the baud rate.
MB95260 series
MB95310 series
MB95330 series
MB95370 series
MB95350 series
MB95390 series
MB95410 series
MB95430 series
MB95560 series
MB95630 series
and following develop MCU
When the adaptor interface connector is mounted on the user system, connect the MCU to the adap-
tor interface connector according to the following specifications.
Connector
Input / output
pin number
← MCU*
1
1
BGMA*
2
-
-
3
BGMA ← MCU
4
5
-
BGMA → MCU
6
7
-
BGMA ← MCU,
8
BGMA → MCU
9
-
10
-
*1 : BGMA means the BGM adaptor.
*2 : MCU means the evaluation MCU.
Note : The MB2146-07-E pin assignment has no compatibility with the MB2146-09 and MB2146-09A-E pin
assignments. It is impossible to use these two BGM adaptors for different MCUs. If used by mistake,
there is a possibility that the debug system will not operate correctly or could be damaged.
Also, some functions are added and deleted as the MB2146-08-E upper compatibility product. See the
MCU hardware manual in use for the details about the connection of the user system and adaptors.
MCU Type
Baud Rate
Table 2 Pin Interface
Evaluation
MCU
connection
pin name
2
User power supply input
UVCC
Vss pin
GND
RSV
User System reset input
RSTOUT
RSV
BGMA power output
VCC
RSV
Communication line
DBG
RSV
RSV
Table 1 Baud Rate List
While synchronization and start debug,
62500
125kbps
While synchronization and start debug,
62500
500kbps
500K
While synchronization and start debug, 1Mbps
Function
Connected to the MCU Vcc pin.
Connected to the MCU Vss pin.
-
Connected to user system reset circuit
-
BGMA supplies power to MCU Vcc
-
1 line UART
-
-
Remark
Remarks
-
-
-
-
-
5
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