參數(shù)資料
型號: MB91340PMT
元件分類: 微控制器/微處理器
英文描述: 32-BIT, MROM, 66 MHz, RISC MICROCONTROLLER, PQFP176
封裝: PLASTIC, LQFP-176
文件頁數(shù): 53/126頁
文件大?。?/td> 1501K
代理商: MB91340PMT
MB91340/MB91V340
32
s MODE SETTINGS
In the FR series, the mode is set by the mode pins (MD2, 1, 0) and mode register (MODR).
1.
Pins
The MD2, MD1, and MD0 pins specify how the mode vector fetch is performed.
Values other than those listed in the table are prohibited.
2.
Register
Mode register (MODR) and setting mode
The data written to the mode register by the mode vector fetch operation is called the mode data.
After the data is set to the mode register (MODR), the device operates with the operating mode specified by this
data.
The mode register is set by all types of reset. The register cannot be written to by user programs.
Note:
The address used by the mode register (0000 07FFH) was unused by previous FR series devices.
The register can be modified in emulator mode. In this case, use an 8-bit data transfer instruction. No data is
written by 16 or 32-bit transfer instructions.
<Register details>
ROMA : Specifies whether the internal Fbus RAM and Fbus ROM areas are enabled.
Mode Pins
Mode name
Reset vector access
area
Remarks
MD2
MD1
MD0
0
Internal ROM vector mode
Internal
0
1
External ROM vector mode
External
The bus width is specified by the
mode register.
ROMA
Function
Remarks
0
External ROM mode The internal Fbus area (4 0000H to 10 0000H) becomes an external area.
1
Internal ROM mode
The internal 112Kbytes of Fbus RAM (128Kbytes on the MB91V340) and
64Kbytes Fbus ROM are enabled.
bit 7 to 3 : Always set “00000B”.
MODR
Initial Value
Access
XXXXXXXXB
W
: Write-only
X
: Undefined
76
54
32
10
0
ROMA
WTH1
WTH0
Operation mode setting bits
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