69
FLD controller
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M
S
b
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3
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0
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C
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2
R
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1
O
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8
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G
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-
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1
6
-
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Toff2 SET/RESET change bit
In gradation display mode, the values set by the Toff2 time set register (TOFF2) are effective. When the
FLD output control register (bit 7 of address 0351
16
) in the initial state = “0”, RAM data is output to the FLD
output ports (SET) at the time that is set by TOFF1 and is turned to “0” (RESET) at the time that is set by
TOFF2. When bit 7 = “1”, RAM data is output (SET) at the time that is set by TOFF2 and is turned to “0”
(RESET) when the Tdisp time expires.
Toff section generate/not generate Function
The function is for reduction of useless noises which generated as every switching of ports, because of the
combined capacity of among FLD ports. In case the continuous data output to each FLD ports, the Toff1
section of the continuous parts is not generated. (See Figure 52)
If it needs Toff1 section on FLD pulses, set “CMOS ports: section of Toff generate / not generate bit” to
“1”
and set “high-breakdown-voltage ports: section of Toff generate / not generate bit” to
“1”
. High-breakdown-
voltage ports (P5, P6, P3, P2, P1, P0, P4
0
to P4
3
, total 52 pins) generate Toff1 section, by setting “high-
breakdown-voltage ports: section of Toff generate / not generate bit” to
“1”
.
The CMOS ports ( P4
4
to P4
7
, total 4 pins ) generate Toff1 section, by setting
“high-breakdown-voltage
ports: section of Toff generate / not generate bit”
to “1”.
Figure 52. Toff Section Generated/not generated Function
P1X
P2X
P1X
P2X
“H” output
Output waveform when
“high-
breakdown-voltage ports: section of Toff
generate/not generate bit”(bit 6 of 0351
16
)
is “0”.
Tdisp
Toff1
Section of Toff1 is not generated because of output is same.
Output waveform when
“high-
breakdown-voltage ports: section of Toff
generate/not generate bit”(bit 6 of 0351
1
6
) is “1”.
“H” output
“H” output
“H” output
“H” output
“H” output
“H” output
“H” output
“H” output
“H” output
“H” output
“H” output
“L” output
“L” output
“L” output
“L” output
Section of Toff1 is not generated because of output is same.