Nova Electronics MCX514, User Manual

Page: 49 / 279

NOVA electronics Inc. MCX514 -
36
－ 36 －
2.4
Multi-Purpose Register
MCX514 has four signed 32-bit multi-purpose registers (MR3~0) per axis.
Multi-purpose register can be used to compare with the current position, speed and timer, and then can read out the status which
represents comparison result and can output as a signal. In addition, it can activate a synchronous action according to comparison
result and can generate an interrupt. As an action of a synchronous action, it can load the values pre-set in multi-purpose registers
as a new speed or drive pulse number, and can save the current position or speed in multi-purpose registers.
Multi-purpose registers can be written / read anytime, by using each multi-purpose register setting command (10h~13h) and
multi-purpose register reading command (34h~37h).
The values of multi-purpose registers are undefined at reset.
2.4.1 Comparative Object and Comparison Condition
As the comparative objects of multi-purpose registers (MR3~0), the values of the logical position counter, real position counter,
current drive speed and timer can be set. The comparison condition expression to the comparative object can be selected from
≧
,
＞
,
＝
,
＜
.
Logical Position Counter
Real Position Counter
32bit
32bit
c
o
m
p
a
re
Multi- Purpose Register × 4
MR3
～
0 32bit
Current Speed
Current Timer
31bit
S
e
le
c
to
r
Use of comparison result
・
Comparison output signal
・
Synchronous action
・
Interrupt
Comparison condition
MRm register setting command (20h)
Comparison condition
MRm register setting command (20h)
Read / Write
Read / Write
Read / Write
Read
Read
Fig. 2.4-1 Multi-Purpose Registers and Compare Function
The user can set the comparative object and comparison condition to four multi-purpose registers individually by using
multi-purpose register mode setting command (20h). Set specified bits of WR6 data writing register and write multi-purpose
register mode setting command (20h) to WR0 register, and then they will be set.
Multi-purpose register mode setting can be read out by multi-purpose register mode setting reading command (40h).
Multi-purpose register mode setting command (20h)
WR6
D7 D6 D5 D4
H L
D15 D14 D13 D12 D11 D10 D9 D8
D3 D2 D1 D0
M0T0 M0T1 M0C0 M0C1 M1T0 M1T1 M1C0 M2T0 M1C1 M2T1 M2C0 M2C1 M3T1 M3T0 M3C0 M3C1
MR0
comparative
object
MR0
comparison
condition
MR1
comparative
object
MR1
comparison
condition
MR2
comparative
object
MR2
comparison
condition
MR3
comparative
object
MR3
comparison
condition