參數(shù)資料
型號: MB91V301A
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 68 MHz, RISC MICROCONTROLLER, CPGA179
封裝: CERAMIC, PGA-179
文件頁數(shù): 61/140頁
文件大小: 2841K
代理商: MB91V301A
MB91301 Series
DS07-16502-4E
27
Unique to the evaluation chip MB91V301A
Tool reset
On an evaluation board, use the chip with INIT and TRST connected together.
Simultaneous occurrences of a software break and a user interrupt/NMI
When a software break and a user interrupt /NMI take place at the same time, the emulator debugger can cause
the following phenomena:
The debugger stops pointing to a location other than the programmed breakpoints.
The halted program is not re-executed correctly.
If these phenomena occur, use a hardware break instead of the software break. If the monitor debugger has
been used, avoid setting any break at the relevant location.
Single-stepping the RETI instruction
If an interrupt occurs frequently during single stepping, execute only the relevant processing routine repeatedly
after single-stepping RETI. This will prevent the main routine and low-interrupt-level programs from being
executed. Do not single-step the RETI instruction for avoidance purposes. When the debugging of the relevant
interrupt routine becomes unnecessary, perform debugging with that interrupt disabled.
Operand break
A stack pointer placed in an area set for a DSU operand break can cause a malfunction. Do not apply a data
event break to access to the area containing the address of a system stack pointer.
ICE startup sequence
When using the ICE, when you start debugging, ensure that the bus configuration is set correctly for the area
being used before downloading. After turning on the power to the target, the states of the RD and WR0 to WR3
pins are undefined until you perform the above setting. Accordingly, include enabling pull-up as part of the startup
sequence. If using these pins as general-purpose ports, set as output ports to prevent conflict with the output
signals during the time the pin states are undefined.
* : Use as output ports.
External bus width
Pin name
32 bit
16 bit
8 bit
RD
Pull-up
WR0
Pull-up
WR1(P85)
Pull-up
*
WR2(P86)
Pull-up
*
WR3(P87)
Pull-up
*
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