Sensoray 626 - Manual (Page 18)

Sensoray Model 626 Instruction Manual 16
Table 14 Counter Registers
Write Read
Offset
(hex)
Register
Name
Description Offset
(hex)
Register
Name
Description
0 CR0A Counter 0A setup register 0 CR0A Counter 0A setup register
2 CR0B Counter 0B setup register 2 CR0B Counter 0B setup register
4 CR1A Counter 1A setup register 4 CR1A Counter 1A setup register
6 CR1B Counter 1B setup register 6 CR1B Counter 1B setup register
8 CR2A Counter 2A setup register 8 CR2A Counter 2A setup register
A CR2B Counter 2B setup register A CR2B Counter 2B setup register
C PRE0ALSW Pre-loads 0A lsw C LATCH0ALSW Reads Latch 0A lsw
E PRE0AMSW Pre-loads 0A msw E LATCH0AMSW Reads Latch 0A msw
10 PRE0BLSW Pre-loads 0B lsw 10 LATCH0BLSW Reads Latch 0B lsw
12 PRE0BMSW Pre-loads 0B msw 12 LATCH0BMSW Reads Latch 0B msw
14 PRE1ALSW Pre-loads 1A lsw 14 LATCH1ALSW Reads Latch 1A lsw
16 PRE1AMSW Pre-loads 1A msw 16 LATCH1AMSW Reads Latch 1A msw
18 PRE1BLSW Pre-loads 1B lsw 18 LATCH1BLSW Reads Latch 1B lsw
1A PRE1BMSW Pre-loads 1B msw 1A LATCH1BMSW Reads Latch 1B msw
1C PRE2ALSW Pre-loads 2A lsw 1C LATCH2ALSW Reads Latch 2A lsw
1E PRE2AMSW Pre-loads 2A msw 1E LATCH2AMSW Reads Latch 2A msw
20 PRE2BLSW Pre-loads 2B lsw 20 LATCH2BLSW Reads Latch 2B lsw
22 PRE2BMSW Pre-loads 2B msw 22 LATCH2BMSW Reads Latch 2B msw
10.2 Encoder connections
Figure 4
Differential pair encoder.
(Output with complement)
Figure 4
Single ended encoder. (TTL or
CMOS)
Figure 5
Single ended event counter with
external count direction & index
control. (TTL or CMOS)
Note: If the counters are driven in a single ended mode as shown in Figure 4 and Figure 5,
then the unused phase inputs do not have to be biased at 2.5V. Each encoder input has two 100K
resistors that bias the input to 2.5V when no driving source is present.
Encoder
A
B
A+
B+
A-
B-
VCC
GND GND
+5V
Index
I+
I-
626
Device
Out
Direction
(+5V=Up, 0V=Down)
A+
B+
A-
B-
VCC
GND GND
+5V
Index
I+
I-
626
2.5V
Encoder
A
B
A+
B+
A-
B-
VCC
GND GND
+5V
Index
I+
I-
626
2.5V