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M32000D3FP Datasheet(Fiches technique) 23 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
23
When writing word-size data aligned on the 32-bit boundary, the
______
M32000D3FP carries out a burst-transfer by outputting the BURST
signal. When burst-writing 32-bit data, the MSB-side 16-bit write bus
cycle is driven first, followed by the LSB-side 16-bit write bus cycle.
______
The BURST signal is synchronized with the CLKIN falling edge of
the first bus access cycle, and "L" level is output. It returns to "H"
level in synchronization with the CLKIN falling edge of the last bus
access cycle. Addresses A8 to A30 are output for each cycle.
_____
When an "L" level is input to HREQ, the M32000D3FP switches to
_____
the hold state and outputs an "L" level to HACK. While the
M32000D3FP is in the hold state, bus related pins go to a high im-
pedance state, and data transfer is carried out on the system bus. To
_____
return to normal operation mode from the hold state, the HREQ sig-
nal should be changed to an "H" level.
Fig. 21 1-word (32-bit) burst write timing (1-0 wait)
Fig. 22 Bus arbitration timing
idle
CLKIN
BS
A8 - A30
SID,ST
BCH, BCL
BURST
D0 - D15
DC
R/W
burst write (1 word)
idle
"Hi-z"
"Hi-z"
Note: "Hi-z" means high-impedance, and
indicates sampling timing.
Wait cycles can be inserted even when burst transferring by setting DC = "H".
Keep DC signal at the "H" level during idle cycles.
"Hi-z"
"Hi-z"
"Hi-z"
(see note 2)
"Hi-z"
"Hi-z"
"Hi-z"
"Hi-z"
Notes 1: Before switching to the hold state, an idle cycle of 1 CLKIN clock period is always
inserted.
After returning from the hold state, an idle cycle of 1 to 5 CLKIN clock periods is
always inserted.
2: "Hi-z" means high impedance, and
indicates sampling timing.
3: While the M32000D3FP is in the hold state, the DC signal is driven and output
when the CS signal is input.
(see note 2)
(see note 3)
write
CLKIN
HREQ
BCH, BCL
D0 - D15
DC
R/W
idle
hold shift
hold
return
idle
HACK
A8 - A30
SID, ST
(see note 1)
(see note 1)
BS
BURST




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