HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 215

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

6.5.5
Table 6.7 shows the pins used for DRAM interfacing and their functions.
Table 6.7
Pin
HWR
LCAS
CS2
CS3
CS4
CS5
CAS
WAIT
A
D
12
15
to A
to D
0
0
Pins Used for DRAM Interface
With DRAM
Setting
WE
LCAS
RAS2
RAS3
RAS4
RAS5
UCAS
WAIT
A
D
DRAM Interface Pins
12
15
to A
to D
0
0
Name
Write enable
Lower column address
strobe
Row address strobe 2
Row address strobe 3
Row address strobe 4
Row address strobe 5
Upper column address
strobe
Wait
Address pins
Data pins
I/O
Output
Output
Output
Output
Output
Output
Output
Input
Output
I/O
Rev.6.00 Sep. 27, 2007 Page 185 of 1268
Function
When 2-CAS system is set,
write enable for DRAM space
access
Lower column address strobe
for 16-bit DRAM space access
Row address strobe when area
2 is designated as DRAM space
Row address strobe when area
3 is designated as DRAM space
Row address strobe when area
4 is designated as DRAM space
Row address strobe when area
5 is designated as DRAM space
Upper column address strobe
for DRAM space access
Wait request signal
Row address/column address
multiplexed output
Data input/output pins
Section 6 Bus Controller
REJ09B0220-0600