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• The B1 type can use the internal +5 V DC as COM (+) by setting the DIP switches on the
BCD board. The factory setting is OFF. (Refer to P42 "7-4. I/O circuitry".)
Switch setting
ON
1
Internal +5 V
1
ON
—
OFF
—
Note
• The LT100's least significant digit (rightmost digit) is the first digit.
The letters in parentheses have the following meanings
A: 1, B: 2, C: 4, D: 8.
• Note that the signal arrangement differs from the LZ51-B (LY51 BCD board).
The I/O logic in the pin status below differs for the B1 and B2 types.
Pin status B1
B2
ON
L
H
OFF
H
L
BCD output
(Refer to P40 "7-2. I/O timing".)
To select the output channel, input SEL1 to SEL4 as shown in the table below and then
input the DRQ signal to pin !¶. The BCD data is output when the ready output (pin @º) goes
ON. To simultaneously latch and continuously output the data for all channels, set all of
SEL1 to SEL4 to ON. After the initial data has been output, the next data is output by
inputting the SET signal to pin 1.
SEL1 (pin @¡)
Slot/channel
A
1
B
A
2
B
A
3
B
A
4
B
A
5
B
All channels
• Output logic
Positive logic or negative logic can be selected. (Refer to P20 "5-1-2. BCD setting")
Positive logic : ON is "0".
OFF is "1".
• Output format
Whether to hold the BCD output data or to set to high-impedance when there is no
DRQ signal input can be selected. (Refer to P20 "5-1-2. BCD settings")
2
2
ON
OFF
1st digit
SEL2 (pin 3)
OFF
ON
ON
OFF
OFF
OFF
ON
ON
OFF
ON
ON
OFF
OFF
OFF
ON
ON
OFF
ON
ON
OFF
ON
ON
SEL3 (pin @™)
SEL4 (pin 4)
ON
ON
ON
ON
ON
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
ON
OFF
ON
OFF
ON
OFF
ON
ON
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