Table of Contents
Advertisement
MB86R02 'Jade-D' Hardware Manual V1.64
11 External Bus Interface
This chapter describes external bus of MB86R02.
11.1 Outline
MB86R02 has external bus interface for accessing to external memory device such as SRAM
and Flash.
11.2 Features
External bus interface of MB86R02 has the following features.
• Supporting 16/32 bit (32 bit is an option) width of SRAM/Flash
• 3 chip selections for SRAM/Flash (MEM_XCS[4] is for boot operation).
• Parameter setting by individual chip selection for SRAM/Flash
• Supporting NOR flash page access
• Supporting Bi-endian
11.3 Block diagram
Figure 11-1 shows block diagram of external bus interface.
MB86R01
Figure 11-1 Block diagram of external bus interface part
AHB I/F
External
Bus I/F
MEM_RDY
MEM_XCS[4/2/0]
MEM_XRD
MEM_EA[24:1]
(MEM_XWR[3:2])
MEM_XWR[1:0]
(MEM_ED[31:16])
MEM_ED[15:0]
MPX_MODE_1[1:0]
BIGEND
11-1
Advertisement
Table of Contents
