EM83040B
LCD CONTROLLER
m in ar y
Preli
(9) Reference circuit examples are as following FIG. 10
(a) Only the internal power supply is used, control register (PS1, PS0, IRS)=(1,1,0)
(b) Only the internal power supply is used, control register (PS1, PS0, IRS)=(1,1,1) When internal regulator
resistor is not used (external resistor is used), V1=VREG*(1+Rb’/Ra’)
(c) Only the V regulator circuit and the V/F circuit are used, control register (PS1, PS0, IRS)=(1,0,0)
(d) Only the V regulator circuit and the V/F circuit are used, control register (PS1, PS0, IRS)=(1,0,1),
When internal regulator resistor is not used (external resistor is used), V1=VREG*(1+Rb’/Ra’)
(e) Only the V/F circuit is used, control register (PS1, PS0)=(0,1)
(f) Only the external power supply is used, control register (PS1, PS0)=(0,0)
VDD
VOUT
MAIN
VSS4
VSS3
CB
C2
C2
C2
VDD
VOUT
MAIN
VSS4
VSS3
CB
C2
C2
C2
VDD
VOUT
MAIN
VSS4
VSS3
CB
CA
EXTERNAL
POWER
SUPPLY
CA
CA
EM83040B
EM83040B
EM83040B
VSS2+
C2
VSS2+
C2
VSS2+
VSS2-
VREG
V1
V2
V3
V4
V5
VSS2-
VREG
V1
V2
V3
V4
V5
C1
VSS2-
VREG
V1
V2
V3
V4
V5
C1
Ra’
Rb’
C1
(a)
(b)
(c)
VDD
VOUT
VSS4
VSS3
CB
CA
EXTERNAL
POWER
SUPPLY
VDD
VOUT
VSS4
VSS3
CB
CA
VDD
VOUT
VSS4
VSS3
CA
CB
EM83040B
EM83040B
VSS2+
VSS2-
VREG
V1
V2
V3
V4
V5
C1
Ra’
Rb’
VSS2+
VSS2-
VREG
V1
V2
V3
V4
V5
C1
EXTERNAL
POWER
SUPPLY
EM83040B
VSS2+
VSS2-
VREG
V1
V2
V3
V4
V5
EXTERNAL
POWER
SUPPLY
(d)
(e)
FIG. 10
(f)
* This specification are subject to be changed without notice.
9.14.2001
12
EMC [ ELAN MICROELECTRONICS CORP ]
