Oki ML420 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.
42113901TH01 Rev.3
MPU
A/D bus
RD
WRL
P01
ALE-P
P07
Clockout*
A0~A19
LSICS-N
ALE
D0~D7
Address
(Read)
RD-N
D0~D7
Address
(Write)
WRL-N
LSI
ALE
ALE
RD-N
RDN
WRL-N
WRL
LSICS-N
LSIC
RAS 1
RAS 0
Data
Data
* Clockout is provided when the original
excitation is selected.
Oki Data CONFIDENTIAL
RAS-N
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