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HD6432351 датащи(PDF) 197 Page - Renesas Technology Corp

номер детали HD6432351
подробное описание детали  16-Bit Single-Chip Microcomputer
PDF  1025 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6432351 датащи(HTML) 197 Page - Renesas Technology Corp

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Section 6 Bus Controller
Rev. 3.00 Sep 15, 2006 page 163 of 988
REJ09B0330-0300
6.5.5
Pins Used for DRAM Interface
Table 6.7 shows the pins used for DRAM interfacing and their functions.
Table 6.7
DRAM Interface Pins
Pin
With DRAM
Setting
Name
I/O
Function
HWR
WE
Write enable
Output
When 2-CAS system is set,
write enable for DRAM space
access.
LCAS
LCAS
Lower column address
strobe
Output
Lower column address strobe
for 16-bit DRAM space access
CS2
RAS2
Row address strobe 2
Output
Row address strobe when
area 2 is designated as DRAM
space.
CS3
RAS3
Row address strobe 3
Output
Row address strobe when
area 3 is designated as DRAM
space.
CS4
RAS4
Row address strobe 4
Output
Row address strobe when
area 4 is designated as DRAM
space.
CS5
RAS5
Row address strobe 5
Output
Row address strobe when
area 5 is designated as DRAM
space.
CAS
UCAS
Upper column address
strobe
Output
Upper column address strobe
for DRAM space access
WAIT
WAIT
Wait
Input
Wait request signal
A12 to A0
A12 to A0
Address pins
Output
Row address/column address
multiplexed output
D15 to D0
D15 to D0
Data pins
I/O
Data input/output pins



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