Page 44
Epson Research and Development
Vancouver Design Center
5.5 CRT/TV Interface
The following figure shows external circuitry for the CRT/TV interface.
CRT/TV
CRT Only
CRT Only
(REG[05Bh] bit 3 = 0)
(REG[05Bh] bit 3 =1)
(REG[05Bh] bit 3 =1)
DAC V = 3.3V
DD
OR
DAC V = 3.3V
DD
OR
DAC V = 2.7V to 5.5V
DD
1.5kΩ
1%
1.5kΩ
1%
1µF
9.2 mA
or
4.6 mA
4.6 mA
9.2 mA
V+
V-
4.6 mA
IREF
R
LM334
2N2222
2N2222
29Ω
1%
69.8Ω
1%
1kΩ
1%
140Ω
1%
1kΩ
1%
1N457
290Ω
1%
DAC V
DAC V
SS
SS
DAC V
DAC V
SS
DAC V
DAC V
SS
SS
SS
R
G
B
To CRT/TV
}
150Ω
1%
150Ω
1%
150Ω
1%
DAC V
DAC V
DAC V
SS
SS
SS
Figure 5-2: External Circuitry for CRT/TV Interface
Note
Example implementation only, individual characteristics of components may affect
actual IREF current.
S1D13506
X25B-A-001-10
Hardware Functional Specification
Issue Date: 01/02/06
EPSON [ EPSON COMPANY ]
