Sp/Lf Motor Control - Oki ML421 Maintenance Manual

2.1.6 SP/LF Motor Control

The MPU transmits serially the SP motor data and the LF motor control data too the SP/LF motor
driver, according to the commands sent from the MPU.
MPU
A/ B
SLATCH-N
P23
P20
P22
Transmission of SP/LF Motor Control Data
SDATA-N
SCLK-N
SLATCH-N
42113901 Rev.2
LSI
SPU
SPV
SPW
Decoder
SDATA-N
Shift
register
SCLK-N
D7 D6 D5
MHM2025
SPU
Distri-
SPV
butor
SPW
SP
LF1
LF2
Space
speed
register
LF phase
register
LF
Overdrive
register
D4 D3 D2
Oki Data CONFIDENTIAL
SP Motor
SPM U
U
SPM V
V
Driver
SPM W
W
A/ B
D/A
A1 A
LF
M
A2
Driver
B
B1
B2
D/A
D1 D0
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