r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 206
r4f2456
Manufacturer Part Number
r4f2456
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R4F2456.pdf
(1376 pages)
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Section 6 Bus Controller (BSC)
Rev. 1.00 Sep. 19, 2008 Page 176 of 1342
REJ09B0467-0100
Bit
2
1
0
φ
Address
RAST = 0 RAS
RAST = 1 RAS
UCAS, LCAS
Bit Name
MXC2
MXC1
MXC0
(2-State Column Address Output Cycle, Full Access)
Initial Value
0
0
0
Figure 6.4 RAS Signal Assertion Timing
T
p
R/W
R/W
R/W
R/W
Row address
Description
111: 11-bit shift
•
•
T
r
When 8-bit access space is designated:
Row address bits A23 to A11 used for
comparison
When 16-bit access space is designated:
Row address bits A23 to A12 used for
comparison
The precharge-sel is A15 to A12 of the column
address.
Bus cycle
T
c1
Column address
T
c2
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