Renesas M3A-HS71, User Manual

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