Renesas R5S72621 Manual Do Utilizador
Section 1 Overview
Page 22 of 2108
R01UH0134EJ0400 Rev. 4.00
Sep
24,
2014
SH7262 Group, SH7264 Group
Classification Symbol
I/O Name
Function
Bus control
RAS
O
RAS
Connected to the
RAS pin when
SDRAM is connected.
CAS
O
CAS
Connected to the
CAS pin when
SDRAM is connected.
CKE
O
CK enable
Connected to the CKE pin when
SDRAM is connected.
SDRAM is connected.
CE1A, CE1B O Lower
byte
select
for PCMCIA card
Connected to PCMCIA card select
signals D7 to D0.
signals D7 to D0.
CE2A, CE2B O Upper
byte
select
for PCMCIA card
Connected to PCMCIA card select
signals D15 to D8.
signals D15 to D8.
ICIOWR
O
Write strobe for
PCMCIA
PCMCIA
Connected to the PCMCIA I/O write
strobe signal.
strobe signal.
ICIORD
O
Read strobe for
PCMCIA
PCMCIA
Connected to the PCMCIA I/O read
strobe signal.
strobe signal.
WE
O
Write strobe for
PCMCIA memory
PCMCIA memory
Connected to the PCMCIA memory
write strobe signal.
write strobe signal.
IOIS16 I
PCMCIA
dynamic
bus sizing
Indicates 16-bit I/O of the PCMCIA.
Direct memory
access controller
access controller
DREQ1, DREQ0 I
DMA-transfer
request
request
Input pins to receive external
requests for DMA transfer.
requests for DMA transfer.
Only DREQ0 can be used in the
SH7262 Group.
SH7262 Group.
DACK1, DACK0 O
DMA-transfer
request accept
request accept
Output pins for signals indicating
acceptance of external requests
from external devices.
acceptance of external requests
from external devices.
Only DACK0 can be used in the
SH7262 Group.
SH7262 Group.
TEND1, TEND0 O
DMA-transfer end
output
output
Output pins for DMA transfer end.
Only TEND0 can be used in the
SH7262 Group.
SH7262 Group.