FUJITSU MB91460 SERIES FR60 - Manual (Page 525)

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Chapter 31 External Bus
1.Overview of the External Bus Interface
1.2 Block Diagram
Figure 1-1 Block Diagram of the External Bus Interface
32 32
Internal address bus Internal data bus
write buffer switch
switch read buffer
ADDRESS BLOCK
DATA BLOCK
+1 or +2
address buffer
ASZ
ASR
BRQ
BGRNT
RDY
RD
WR0,WR1,
WR2,WR3,
AS,BAA
SRAS,SCAS,
SWE,MCLKE,
DQMUU,DQMUL,
DQMLU,DQMLL
CS0 CS7
MUX
all-block control
registers
control
comparator
SDRAM control
RCR
refresh counter
underflow
External data bus
External address bus
External terminal controller