SED1565 Datasheet, PDF (36/87 Pages) Epson Company – Direct display of RAM data through the display data RAM

SED1565 Series
V₅
=
_{1 +}
Rb 
Ra ^
⋅ V_EV
=
_{1 +}
Rb 
Ra ^
⋅ ^1 –
α
162 ^
⋅ V_REG
[ ^{( )} ] ^QVEV ^{= 1 − α} 162 ^{⋅ V}REG
(Equation A-1)
Internal Ra
VDD
VEV (constant voltage supply + electronic volume)
+
V5
–
Internal Rb
Figure 8
VREG is the IC-internal fixed voltage supply, and its
voltage at Ta = 25°C is as shown in Table 9.
Equipment Type
(1) Internal Power Supply
(2) Internal Power Supply
(3) External Input
Table 9
Thermal Gradient
–0.05
–0.2
—
Units
[%/°C ]
[%/°C ]
—
VREG
–2.1
–4.9
VRS
Units
[V]
[V]
[V]
α is set to 1 level of 64 possible levels by the electronic
volume function depending on the data set in the 6-bit
electronic volume register. Table 10 shows the value for
α depending on the electronic volume register settings.
Table 10
D5 D4 D3 D2 D1 D0 α
0 0 0 0 0 0 63
0 0 0 0 0 1 62
0 0 0 0 1 0 61
...
...
111101 2
111110 1
111111 0
Rb/Ra is the V5 voltage regulator internal resistor ratio,
and can be set to 8 different levels through the V5
voltage regulator internal resistor ratio set command.
The (1 + Rb/Ra) ratio assumes the values shown in
Table 11 depending on the 3-bit data settings in the V5
voltage regulator internal resistor ratio register.
8–34
EPSON