參數(shù)資料
型號: M37905M6C-XXXSP
廠商: Mitsubishi Electric Corporation
英文描述: DIO, BAT54C, DUAL SHOTTKEY, COMMON CATHODE, SOT23
中文描述: 16位CMOS微機
文件頁數(shù): 15/102頁
文件大?。?/td> 881K
代理商: M37905M6C-XXXSP
15
M37905M4C-XXXFP, M37905M4C-XXXSP
M37905M6C-XXXFP, M37905M6C-XXXSP
M37905M8C-XXXFP, M37905M8C-XXXSP
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
16-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
BUS INTERFACE UNIT
Data transfer between the central processing unit (CPU) and inter-
nal memory, internal peripheral devices is always performed via the
bus interface unit (BIU), which is located between the CPU and the
internal buses.
Figure 5 shows the BIU and the bus structure. The CPU and BIU are
connected by a dedicated bus, and any transfer between the CPU
and BIU is controlled by this dedicated bus.
On the other hand, data transfer between the BIU and internal pe-
Fig. 5 BIU and bus structure
Internal code bus (CB
0
to CB
31
)
Central
Processing
Unit
(CPU)
SFR : Special Function Register
The CPU bus and internal bus separate out independently.
CPU bus
Internal buses
Internal data bus (DB
0
to DB
15
)
Internal
memory
Internal
peripheral
devices
(SFR)
Internal address bus (AD
0
to AD
23
)
M37905
Bus
Interface
Unit
(BIU)
Internal control signal
ripheral devices uses the following internal common buses: 32-bit
code bus, 16-bit data bus, 24-bit address bus, and control signals.
The bus control method where the code bus and the data bus sepa-
rate out (hereafter, this method is referred to as the separate code/
data bus method) is employed in order to improve data transfer ca-
pabilities. As a result, the internal memory is connected to both the
code bus and the data bus, and registers of all other internal periph-
eral devices are connected only to the data bus.
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