Oki ML490 Maintenance Manual page 15

(6) LSI
This LSI detects and controls the SP motor speeds by monitoring the two phase sensor
signals obtained from the DC motors and modifying the excitation phases as appropriate.
This LSI is connected in multiplex to the MPU.
Clockout*
A0~A19
LSICS-N
ALE
D0~D7
(Read)
RD-N
D0~D7
(Write)
WRL-N
42114101 Rev.1
MPU
A/D bus
RD-N
RD
WRL-N
WRL
LSICS-N
P01
ALE-P
P07
Address
Address
LSI
ALE
ALE
RDN
WRL
LSIC
RAS 1
RAS-N
RAS 0
Data
Data
* Clockout is provided when the original
excitation is selected.
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