FUJITSU 50FH5037E-02 - Manual (Page 69)

(j) Control register #20
#20
7 6 5 4 3 2 1 0
LSB
Read density (256>step selection) (*1)
X©00π Default (same as for X©80π )
X©01π Light
To Ø
X©FFπ Dark
*1 This register is valid if bit 0 of control register #19 is 1.
X©00π is set whenever the power is turned on or when the initial state is specified by
the CLEAR command.
(k) Control register #21
#21
7 6 5 4 3 2 1 0
LSB
Contrast specification
X©00π Default (same as for X©80π )
X©01π Lowest contrast
X©80π Normal
X©FFπ Highest contrast
X©00π is set whenever the power is turned on or when the initial state is specified by
the CLEAR command.
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