參數(shù)資料
型號(hào)： M37733MHB
廠商： Mitsubishi Electric Corporation
英文描述： Single Chip 16 Bits CMOS Microcomputer(16位單片機(jī))
中文描述： 單片微機(jī)16位的CMOS（16位單片機(jī)）
文件頁(yè)數(shù)： 51/89頁(yè)
文件大?。?/td> 1992K
代理商： M37733MHB
51
MITSUBISHI MICROCOMPUTERS
M37733MHBXXXFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
Fig. 60 Relationship between wait bit, wait selection bit, and access time
Wait bit
As shown in Figure 60, when the external memory area is accessed
with the wait bit (bit 2 of the processor mode register 0 at address
5E
16
) cleared to “0”, the access time can be extended compared with
no wait (the wait bit is “1”).
The access time is extended in two ways and this is selected with the
wait selection bit (bit 0 of the processor mode register 1 at address
5F
16
).
When this bit is “1”, the access time is 1.5 times compared to that for
no wait. When this bit is “0”, the access time is twice compared to
that for no wait.
At reset, the wait bit and the wait selection bit are “0”.
The accessing of internal memory area is always performed in the
no wait mode regardless of the wait bit.
The processor modes are described below.
Fig. 59 External memory area for each processor mode
Wait bit “1”
(No wait)
Wait bit “0”
(Wait 1)
Wait bit “0”
(Wait 0)
Internal clock
Port P2
ALE
Port P2
ALE
Access time
Access time
Address
Data
Address
Data
Address
Data
Address
Data
Port P2
ALE
Access time
Address
Data
Address
SFR
RAM
Microprocessor
mode
The shaded area is the external memory area.
SFR
00
16
80
16
FFFFFF
16
RAM
ROM
Memory expansion
mode
1000
16
1FFFF
16
E
FFF
16
SFR
RAM
Evaluation
chip mode
2
16
A
16
C
16
E
E
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