Intel 386 - Manual (Page 464)

15-3
REFRESH CONTROL UNIT
Figure 15-1. Refresh Control Unit Connections
S
y
s
t
e
m
B
u
s
Interval Timer Unit
Refresh Clock Interval Register
10-bit Interval Counter
Control Unit
Address Generation Unit
Refresh Base Address Register
13-bit Address Counter
REFRESH#
(pin mux)
Refresh
Request
Refresh
Acknowledge
A25:14
A13:1
Refresh Control Register
Refresh Address Register
A2341-01
Timeout
Processor Clock
(CLK2/2)