DX-SX1H
– 48 –
IC503 VHi-1: Stepping Motor Driver (TB6504F)
1
CK1
Clock signal input
2, 3
M1, M2
Excitation mode set terminal
4
REF IN
Output reference value (VNF) set terminal H: VNF=0.5V, L: VNF=0.25V
5*
MO
Monitor output L: Initial condition
6*
NC
Not used
7
VCC
Logic side power terminal
8
VMB
Output side power terminal
9
øB
B output
10
PG-B
Power ground
11
NFB
B channel current detection terminal
12
øB
B output
13
øA
A output
14*
NFA
A channel current detection terminal
15
PG-A
Power ground
16
øA
A output
17
VMA
Output side power terminal
18*
NC
Not used
19
S-GND
Signal ground
20
RESET
Reset signal input
21
ENABLE
Enable signal input
22
OSC
Internal oscillation frequency set terminal. Capacitor is externally mounted.
23
CW/CCW
Clockwise/counterclockwise input
24
CK2
Clock signal input
Pin No.
Terminal Name
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Function
Figure 48 BLOCK DIAGRAM OF IC
7
VCC
5
MO
17
16
13
YMA
ØA
ØA IA
14
NFA
8
VMB
12
9
ØB
11
10
NFB
ØB IB
PG-B
(POWER
GROUND B)
15
PG-A
(POWER
GROUND A)
19
4
SG
(SIGNAL GROUND)
REF IN
22
OSC
21
ENABLE
20
RESET
24
CK2
23
CW/CCW
1
CK1
3
M2
2
M1
O S C
+
+
+
+
BRIDGE
DRIVER
ENABLE
RESET
BRIDGE
DRIVER
ENABLE
RESET
DECODER
DECODER
DECODER
DECODER
SET CURRENT
VALUE SELECTOR
CIRCUIT
SET CURRENT
VALUE SELECTOR
CIRCUIT
MAXIMUM
CURRENT
SELECTOR
CIRCUIT
CK1
M1
M2
REF IN
MO
NC
VCC
VMB
ØB
PG-B
NFB
ØB
CK2
CW/CCW
OSC
ENABLE
RESET
S-GND
NC
VMA
ØA
PG-A
NFA
ØA
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
