Renesas SH7709S Bedienungsanleitung PDF herunterladen (Seite 38)

Rev. 1.0, 07/03, page 34 of 38

Vdd

VddQ

Vss

VssQ

3.3V

GND

A15

SH7727 256-Mbit SDRAM(×16)

A14

A13

CKIO

CKE

RD/

DQMLU

DQMLL

D15

BA1

BA0

A12

CLK

CKE

DQMU

DQML

DQ15

DQ0

Figure 2.12 Interface between SDRAM (HM5225165B-B6) and SH7727

2.2.8 HM5225165B-B6 (4 Mwords ×16 bits × 4 banks)

Bus State Controller (BSC) Settings: When two SDRAMs (HM5225165B-B6) are connected to

area 3 of the SH7727 via a 32-bit bus, the bus state controller (BSC) must be specified as

summarized below. Table 2.13 lists the BSC register settings.

Note that the interface between SDRAM and the SH7727 is performed with bus clock = 66 MHz,

CL = 2, TPC = 2, RCD = 2, TRWL = 1, and TRAS = 4.

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 44

Keine Kommentare

Renesas SH7709S Bedienungsanleitung Seite 38