SH7263 Datasheet, PDF (50/1862 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

Section 1 Overview
Classification Symbol
Bus control
WE1
WE2
WE3
DQMLL
DQMLU
DQMUL
DQMUU
RASU, RASL
CASU, CASL
CKE
CE1A, CE1B
CE2A, CE2B
ICIOWR
ICIORD
WE
IOIS16
REFOUT
I/O Name
Function
O Byte select
Indicates a write access to bits 15 to
8 of data of external memory or
device.
O Byte select
Indicates a write access to bits 23 to
16 of data of external memory or
device.
O Byte select
Indicates a write access to bits 31 to
24 of data of external memory or
device.
O Byte select
Selects bits D7 to D0 when SDRAM
is connected.
O Byte select
Selects bits D15 to D8 when SDRAM
is connected.
O Byte select
Selects bits D23 to D16 when
SDRAM is connected.
O Byte select
Selects bits D31 to D24 when
SDRAM is connected.
O RAS
Connected to the RAS pin when
SDRAM is connected.
O CAS
Connected to the CAS pin when
SDRAM is connected.
O CK enable
Connected to the CKE pin when
SDRAM is connected.
O Lower byte select Connected to PCMCIA card select
for PCMCIA card signals D7 to D0.
O Upper byte select Connected to PCMCIA card select
for PCMCIA card signals D15 to D8.
O Write strobe for Connected to the PCMCIA I/O write
PCMCIA
strobe signal.
O Read strobe for Connected to the PCMCIA I/O read
PCMCIA
strobe signal.
O Write strobe for Connected to the PCMCIA memory
PCMCIA memory write strobe signal.
I
PCMCIA dynamic Indicates 16-bit I/O of the PCMCIA.
bus sizing
O Refresh request Request signal for refresh execution.
Rev. 2.00 Mar. 14, 2008 Page 16 of 1824
REJ09B0290-0200