Memory; Sh7086 On-Chip Memory; Sdram - Renesas Renasas Single-Chip Microcomputer SH7086 User Manual

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2.3 Memory

2.3.1 SH7086 On-chip Memory

The SH7086 includes 512-Kbyte flash memory and 32-Kbyte SRAM.

2.3.2 SDRAM

The M3A-HS86 (3.3V version) mounts 16MB SDRAM as standard equipment. SDRAM is controlled by the bus
state controller built into SH7086. Table2.3.1 lists SDRAM specifications used in M3A-HS86. Figure2.3.1 shows the
block diagram of SDRAM connection.
Specifications
Configuration
Capacity
Access Time
CAS Latency
Refresh Interval
Row Address
Column Address
Number of Banks
Rev.1.0 Feb 06. 2007
REJ10J0916-0100
Table2.3.1 SDRAM Specifications
16 Mbytes (16-bit bus) x 1pc.
16 Mbytes
5.4ns
2(at 40MHz bus clock)
4,096 refresh cycles every 64ms
A11- A0
A8 - A0
4-bank operation controlled by BA0 and BA1
SH7086
A14
A13
A12-A1
CK
CKE
CS3
RASL
CASL
RDWR
DQMLU
DQMLL
D15-D0
Figure2.3.1 Block Diagram of SDRAM Connection
Contents
SDRAM
(8M Word x 16bit)
BA1 BA1
BA0 BA0
11
A11-A0
- A 0 A11
CLK CLK
CKE CKE
CS# CS
R A S #
RAS
CAS
CAS
WE WE#
DQMU DQMU
DQML DQML
16
DQ15-DQ0
Functional Overview
2.3 Memory
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