參數(shù)資料
型號: M37640E8
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCONTROLLER
中文描述: 單芯片8位CMOS單片機
文件頁數(shù): 38/172頁
文件大?。?/td> 1193K
代理商: M37640E8
2-26
7/9/98
Peripheral Interface
7600 Series
M37640E8-XXXF Preliminary Specification
Mitsubishi Microcomputers
2.6.2
Peripheral Interface and Access Timing
The M37640 offers a wide variety of peripherals. These include RAM, EPROM, UARTs, SIOs, 8-bit
and 16-bit timers, various I/O ports, clock generators, and USB core.
The interface between the CPU, the peripheral decode block, and peripheral blocks is shown in
Figure 2-24. Signals DB7 to DB0, AB2 to AB0, R/W, EB, and at least one peripheral decode (PD
n
B)
are routed to each peripheral. The address signals and peripheral decode signal are used in the
peripheral block to create decode signals for each register. Because three address bits are available at
the peripheral, a maximum of eight decode signals can be created for each peripheral decode signal.
If the peripheral contains more than eight registers, additional peripheral decode signals are routed to
the peripheral.
Figure 2-24. Internal Peripheral Interface
CPU
[P1]
[P2]
Peripheral 1
Peripheral 2
Peripheral N
Peripheral
Decode
PD1B
PD2B
.
PDNB
Reg
decode
AB
PD1
D1
D2
.
DN
P1
P1
PD1
E
R
[
perDB[7:0]
RDbuf
DB[7:0]
P1
P2
P2
AB[2:0], R/W, EB
AB[15:0]
Register N
Register 2
Register 1
P2
R/W
E
D1
D1
E
WRreg
RDreg
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