
287
FLD controller
(b) Timing number
The following two types of timing can be selected:
16-timing
This timing is used when the display timing is 16 sets or less.
32-timing
This timing is used when the display timing is more than 16 sets. This can be used for up to 32 sets.
(c) Gradation display mode
The gradation display mode can apply bright/dark display for each segment when the display timing
is 16 or less.
Selection of gradation mode is as follows:
Gradation display mode ON
Make sure to fix the timing number control bit (bit 4 of address 0350
16
) to “0” as the maximum timing
is 16. Additionally, set the value to the Toff2 time set register (address 0356
16
) so that Toff2 time
can be less than Tdisp time and more than Toff1 time.
Gradation display mode OFF
(d) HBV port drivability
Two types of drivability, strong or weak, can be selected for HBV ports. This setting is also valid when
using HBV ports as general purpose ports.
(e) P4
4
to P4
7
FLD output reverse
Selecting this function enables the polarity reversal of the FLD output from P4
4
to P4
7
. This function
is useful for adjusting the polarity when using an externally installed driver.
(f) P4
4
to P4
7
Toff invalid
Selecting this function disables Toff1 time and Toff2 time and outputs display data for the duration of
Tdisp.
(g) P9
7
dimmer signal output
Selecting this function outputs a signal from DIMOUT (P9
7
) to the decoder which, in turn, sends out
the dimmer signal. The decoder controls this signal to enable the dimmer function.
(h) Toff section generate/not generate
This function can be applied to all of the HBV ports (P0, P1, P2, P3, P4
0
to P4
3
, P5, P6) and CMOS
ports (P4
4
to P4
7
). Two types can be selected:
Generate Toff section
The Toff section is generated.
No Toff section
This function reduces unwanted noises generated whenever a port switches due to the combined
capacity of the FLD ports. When continuous data is output to each FLD port, the Toff1 section of the
continuous parts is not generated.