Renesas SH7670 Series User Manual page 18

2
Type Pin
RAS#
CAS#
RD/WR#
RD#
WE0#/DQMLL
WE1#/DQMLU
WE2#/DQMUL
WE3#/DQMUU
WAIT#
Address Bus A25-A00
Data Bus D31-D00
Rev.1.01 2008.05.07
REJ11J0012-0101
Table 2.2.2 SH7670 Pin Selection Used on SH7670 CPU Board (2)
I/O Name
RAS
O
CAS
O
Read-write
O
Read
O
Least significant byte
O
written/least
significant byte
selection
Third byte
O
written/third byte
selection
Second byte
O
written/second byte
selection
Most significant byte
O
written/most
significant byte
selection
I Wait
Address bus
O
Data bus
O
Function of SH7670 CPU
Board
RAS signal
RAS#
CAS signal
CAS#
Read-write signal
RD/WR#
Read signal
RD#
D7-D0 is selected
WE0#/DQMLL(WE0#/DQM
LL)
D15-D8 is selected
DQMLU(WE1#/DQMLU/WE
#)
D23-D16 is selected
DQMUL(WE2#/DQMUL/ICI
ORD#)
D31-D24 is selected
DQMUU(WE3#/DQMUU/ICI
OWR#)
WAIT#: PB00/WAIT#/SDA
26-bit address bus
32-bit data bus
Functional Overview
2.2 CPU
Destination to Connect
• Connects to the RAS# pin of
SDRAM (U4-18,U5-18)
• Connects to an extension
connector (J9-12)
• Connects to the CAS# pin of
SDRAM (U4-17,U5-17)
• Connects to an extension
connector (J9-13)
• Connects to the WE# pin of
SDRAM (U4-16,U5-16)
• Connects to an extension
connector (J9-15)
• Connects to the OE# signal of
NOR flash memory (U3-28)
• Connects to an extension
connector (J12-5)
• Connects to the WE# pin of NOR
flash memory (U3-11)
• Connects to the DQML pin of
SDRAM (U5-15)
• Connects to an extension
connector (J9-19)
• Connects to the DQMU pin of
SDRAM (U5-39)
• Connects to an extension
connector (J9-18)
• Connects to the DQMU pin of
SDRAM (U4-15)
• Connects to an extension
connector (J9-17)
• Connects to the DQML pin of
SDRAM (U4-39)
• Connects to an extension
connector (J9-16)
Connects to an extension connector
(J9-10)
• A25-A00
Connects to an extension
connector (J12)
• A22-A01
Connects to FLASH (U3)
• A16-A02
Connects to SDRAM (U4,U5)
• D15-D00
Connects to FLASH (U3)
• D31-D00
SDRAM(U4,U5)
Connects to an extension
connector (J5)
2-4