M66335FP Datasheet, PDF (25/57 Pages) Mitsubishi Electric Semiconductor – FACSIMILE IMAGE DATA PROCESSOR

MITSUBISHI 〈DIGITAL ASSP〉
M66335FP
FACSIMILE IMAGE DATA PROCESSOR
Uniformity correction data can be written to and read from SRAM for
uniformity correction built in the M66335 through the MPU bus. With
this operation, the uniformity data can be temporarily saved in the
backup memory when the power is off. The sequences of writing and
reading uniformity correction data are shown below.
Writing to the uniformity correction memory (MPU → M66335)
Initial setting (1)
Initial setting (2)
Memory address (0) Memory address (1)
CSB
A4 ~ A0
00H
01H
19H
19H
~
WRB
D7 ~ D0
(Input)
D1
1
D0=“1”
2
Reading from the uniformity correction memory (M66335 → MPU)
DATA (0)
3
DATA (1)
3
Initial setting (1)
Initial setting (2) Memory address (0) Memory address (1)
CSB
A4 ~ A0
00H
01H
19H
19H
~
WRB
D7 ~ D0
(Input)
D1
D0=“1”
RDB
D7 ~ D0
(Output)
1
DATA (0)
DATA (1)
2
4
4
1 “0” (black correction) or “1” (white correction) is set in D1 (Umode) of the register 00.
2 D0 (CNTRST) of the register 01 is set at “1” to reset the address counter of the uniformity correction memory.
3 UNIF_D is selected in the register 19, and DATA (0) of the MPU bus (D5 to D0) is written in the memory. The address counter of the
uniformity correction memory is incremented at the edge of the first transition of WRB. (For writing)
4 UNIF_D is selected in the register 19, and DATA (0) of the uniformity correction memory is read into the MPU bus (D5 to D0). The address
counter of the uniformity correction memory is incremented at the edge of the first transition of RDB. (For reading)
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