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M32000D3FP Datasheet(Fiches technique) 41 Page - Mitsubishi Electric Semiconductor

Numéro de pièce M32000D3FP
Description  SINGLE-CHIP 32-BIT CMOS MICROCOMPUTER  
Télécharger  45 Pages
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Fabricant  MITSUBISHI [Mitsubishi Electric Semiconductor]
Site Internet  http://www.mitsubishichips.com
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SINGLE-CHIP 32-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
M32000D3FP
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.
• minimum value of td(CLKIN-HACKHX) = (value in table) – (correction value) = 0 – (60 x 5/100) = –3 [ns]
• maximum value of td(CLKIN-HACKL) = (value in table) + (correction value) = 12 + (60 x 5/100) = 15 [ns]
[example]
HACK signal transition ("H" –> "L") when inputting 16.65 MHz clock whose duty ratio is 45 - 55% (
± 5%) to CLKIN:
0.5VCC
0.5VCC
td(CLKIN-HACKL)
td(CLKIN-HACKHX)
td(CLKIN-HACKH)
td(CLKIN-HACKLX)
td(CLKIN-AZX)
td(CLKIN-AZ)
tsu(HREQ-CLKIN)
41
42
43
44
45
46
47
*1
*1
th(CLKIN-HREQ)
40
*2
*2
*2
*2




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