r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 185

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

Legend:
Note:
Bit
10
9
8
Bit Name
W22
W21
W20
*
X:
The synchronous DRAM interface is not supported by the H8S/2426 Group and
H8S/2424 Group.
Don’t care.
Initial Value
1
1
1
R/W
R/W
R/W
R/W
Description
Area 2 Wait Control 2 to 0
These bits select the number of program wait
states when accessing area 2 while AST2 bit in
ASTCR = 1.
A CAS latency is set when the synchronous
DRAM* is connected. The setting of area 2 is
reflected to the setting of areas 2 to 5. A CAS
latency can be set regardless of whether or not an
ASTCR wait state insertion is enabled.
000: Program wait not inserted
001: 1 program wait state inserted
010: 2 program wait states inserted
011: 3 program wait states inserted
100: 4 program wait states inserted
101: 5 program wait states inserted
110: 6 program wait states inserted
111: 7 program wait states inserted
000: Synchronous DRAM of CAS latency 1 is
001: Synchronous DRAM of CAS latency 2 is
010: Synchronous DRAM of CAS latency 3 is
011: Synchronous DRAM of CAS latency 4 is
1XX: Setting prohibited.
connected to areas 2 to 5.
connected to areas 2 to 5.
connected to areas 2 to 5.
connected to areas 2 to 5.
Rev. 1.00 Sep. 19, 2008 Page 157 of 1270
Section 6 Bus Controller (BSC)
REJ09B0466-0100