µPD6464A,6465
2.10 Output Level Control Command
The µPD6464A, 6465 can set the luminance level of the character and background (including the frame) by
using a command.
This command is a 2-byte command, and must be input in 16-bit units even when successively input.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
10
010
0
0 VPD 0 0
00
0
1 VC1 VC0
Character level control bits
VC1 VC0
Function
0
0 Setting Prohibited
0
1 75 I.R.E.
1
0 Setting Prohibited
1
1 90 I.R.E.
Internal video signal amplitude control bit
VPD
Function
0
1 Vp-p amplitude
1
2 Vp-p amplitude
• Character level control bits
These bits can select two character luminance levels: 75 or 90 I.R.E.
If these bits are not set, the character level is set to 75 I.R.E.
Remark The background (frame) level is fixed to 0 I.R.E.
• Internal video signal amplitude control bit
This bit sets the amplitude of the internal video signal to 1 or 2 Vp-p (this amplitude must match the amplitude of
the signal input in the external video signal mode). When the amplitude is set to 1 Vp-p, the voltage applied to the
VCNT pin must be 2.5 V.
When the amplitude is set to 2 Vp-p, apply 5 V to the VCNT pin.
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