4 register definitions, Table 152. rcu registers – Intel 386 User Manual
Page 467

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL
15-6
15.4 REGISTER DEFINITIONS
Table 15-2 provides an overview of the registers associated with the RCU. The following sections
provide specific programming information for each register.
Table 15-2. RCU Registers
Register
Expanded
Address
Description
RFSCIR
(read/write)
0F4A2H
Refresh Clock Interval:
Determines the processor clock (CLK2/2) count between refresh requests.
RFSCON
(read/write)
0F4A4H
Refresh Control:
Enables the refresh control unit. Reading this register also provides the
current value of the interval counter.
RFSBAD
(read/write)
0F4A0H
Refresh Base Address:
Contains the A25:14 address bits of the refresh address. This establishes
a memory region for refreshing.
RFSADD
(read/write)
0F4A6H
Refresh Address:
Contains the A13:1 address bits of the refresh address. The 13-bit address
counter generates these values.
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