Clkprs; D.2 Clkprs - Intel 386 User Manual

D.2

CLKPRS

Clock Prescale Register
CLKPRS
(read/write)
15
— —
7
PS7 PS6
Bit Bit
Number Mnemonic
15–9 —
8–0 PS8:0
— —
PS5 PS4
Reserved. These bits are undefined; for compatibility with future devices,
do not modify these bits.
Prescale Value:
These bits determine the divisor that is used to generate PSCLK. Legal
values are from 0000H (divide by 2) to 01FFH (divide by 513).
divisor = PS8:0 + 2
SYSTEM REGISTER QUICK REFERENCE
Expanded Addr: F804H
ISA Addr: —
Reset State: 0000H
— —
PS3 PS2
Function
8
— PS8
0
PS1 PS0
D-7