M30218 Datasheet, PDF (70/179 Pages) Mitsubishi Electric Semiconductor – M30218 Group

FLD controller
Mitsubishi microcomputers
M30218 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Digit pulses output Function
P50 to P57 and P60 to P67 allow digit pulses to be output using the FLD/digit switch register. Set the digit
output set register by writing as many consecutive 1s as the timing count from P60. The contents of FLD
automatic display RAM for the ports that have been selected for digit output are disabled, and the pulse
shown in Figure KA-16 is output automatically. In gradation display mode use, Toff2 time becomes effective
for the port which selected digit output. Because the contents of FLD automatic display RAM are disabled,
the segment data can be changed easily even when segment data and digit data coexist at the same
address in the FLD automatic display RAM.
This function is effective in 16-timing normal mode and 16-timing gradation display mode. If a value is set
exceeding the timing count (FLD data pointer reload register's set value + 1) for any port, the output of such
port is “L”.
Toff1
Tdisp
P57
P56
P55
P54
P53
P52
P51
P50
P67
P66
P65
P64
P63
P62
P61
P60
Low-order 4bits
of the data pointer
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
Fig. KA-16. Digit Pulses Output Function
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