Oki ML420 - Setting Print Quality

42113901TH01 Rev.3 22 /
Oki Data CONFIDENTIAL
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.
Transmission of SP/LF Motor Control Data
MPU
φA/φB
φA/φB
φB
φA
LF
A1
A2
B1
B2
M
SLATCH-N
SDATA-N
SCLK-N
LSI MHM2025
SPU
SPV
SPW
SPU
Distri-
butor
Driver
SPV
SPW
Decoder
Space
speed
register
LF phase
register
LF
Overdrive
register
D/A
D/A
Driver
Shift
register
SP
LF1
LF2
SPM U
SP Motor
SPM V
SPM W
U
V
W
P23
P20
P22
SDATA-N
SCLK-N
SLATCH-N
D7 D6 D5 D4 D3 D2 D1 D0