Fujitsu FR60 Hardware Manual page 182

CHAPTER 4 EXTERNAL BUS INTERFACE
■ Block Diagram of the External Bus Interface
Figure 4.1-1 shows the block diagram of the external bus interface.
Internal address bus
164
Figure 4.1-1 Block Diagram of the External Bus Interface
Internal data bus
32 32
write buffer
read buffer
address buffer
ASR
ASZ
External terminal controller
MUX
switch
switch
ADDRESS BLOCK
+1 or +2
comparator
All-block control
resisters
&
control
External data bus
DATA BLOCK
External address bus
CS0 to CS3
RD
WR0, WR1
AS
BRQ
BGRNT
RDY