參數(shù)資料
型號: M32000D4BFP-80
廠商: Mitsubishi Electric Corporation
英文描述: Single Chip 32 Bits Microcomputer(32位 單片機(jī))
中文描述: 32位單片微機(jī)(32位單片機(jī))
文件頁數(shù): 41/44頁
文件大?。?/td> 448K
代理商: M32000D4BFP-80
SINGLE-CHIP 32-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
M32000D4BFP-80
41
Fig. 41 Bus arbitration timing
CLKIN
HREQ
HACK
A8 to A30, SID, ST,
BS, BCH, BCL,
R/W, BURST
(output)
(input)
(input)
(output)
*1 The HREQ signal can be input asynchronously.
*2 All switching characteristics and timing requirements based on the falling edge of CLKIN are calculated according to
the internal CLKIN (duty ratio is 50%) . When designing external peripheral circuits, the correction for the duty cycle of
the actual CLKIN is necessary.
[example]
HACK signal transition ("H" –> "L") when inputting 20 MHz clock whose duty ratio is 45 - 55% (± 5%) to CLKIN:
minimum value of td(CLKIN-HACKHX) = (value in table) – (correction value) = 0 – (50 x 5/100) = –2.5 [ns]
maximum value of td(CLKIN-HACKL) = (value in table) + (correction value) = 8 + (50 x 5/100) = 10.5 [ns]
0.5VCC
0.5VCC
t
d(CLKIN-HACKL)
t
d(CLKIN-HACKHX)
43
t
d(CLKIN-HACKH)
t
d(CLKIN-HACKLX)
t
d(CLKIN-AZX)
t
d(CLKIN-AZ)
t
su(HREQ-CLKIN)
41
42
44
45
46
47
*1
*1
t
h(CLKIN-HREQ)
40
*2
*2
*2
*2
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