r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 202

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 6 Bus Controller (BSC)
Rev. 1.00 Sep. 19, 2008 Page 174 of 1270
REJ09B0466-0100
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