Renesas R5S72641 Manuale Utente
Section 9 Bus State Controller
R01UH0134EJ0400 Rev. 4.00
Page 233 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
Name I/O
Function
WE0/DQML Output
Indicates
that
D7 to D0 are being written to.
Connected to the byte select signal when a SRAM with byte
selection is connected.
selection is connected.
Functions as the select signals for D7 to D0 when SDRAM
is connected.
is connected.
RAS Output
Connects
to
RAS pin when SDRAM is connected.
CAS Output
Connects
to
CAS pin when SDRAM is connected.
CKE
Output
Connects to CKE pin when SDRAM is connected.
WAIT
Input
External wait input
BREQ
Input
Bus request input
BACK
Output
Bus enable output
IOIS16
Input
Indicates 16-bit I/O of PCMIA.
Enabled only in little endian mode. The pin should be driven
low in big endian mode.
low in big endian mode.