908E626_12 Datasheet, PDF (33/43 Pages) Freescale Semiconductor, Inc – Integrated Stepper Motor Driver with Embedded MCU and LIN Serial Communication

TYPICAL APPLICATIONS
VSUP
RS232
DB-9
2
3
5
VDD
1 _C1+
1µF ⁺
VCC ¹⁶
3 _C1-
GND ¹⁵
4 _C2+
V+ ²
1µF ⁺
V- ⁶
5 _C2- ^MAX232
+ _1µF
1µF
+
1µF
+
7 T2_OUT
8 R2_IN
T2IN 10
74HC125
R2OUT 9 2
3
1
74HC125
6
5
4
+
47µF
100nF
VTST
VSUP[1:3]
GND[1:2]
VDD
VDD
VSS
RST
RST_A
IRQ
IRQ_A
MM908E626
VREFH
VDDA
EVDD
VREFL
VSSA
EVSS
100nF
VDD
10k
9.8304MHz CLOCK
CLK _PTC4/OSC1
DATA _PTA0/KBD0
10k
PTB4/AD4
10k
PTA1/KBD1
10k
PTB3/AD3
4.7µF
VDD
Figure 17. Normal Monitor Mode Circuit
Table 10 summarizes the possible configurations and the
necessary setups.
Table 10. Monitor Mode Signal Requirements and Options
Serial
Mode
Mode
IRQ RST
Reset
Vector
Communication
Selection
ICG
PTA0 PTA1 PTB3 PTB4
COP
Normal
Request
Timeout
Communication Speed
External Bus
Baud
Clock ^Frequency Rate
Normal V_TST V_DD
X
Monitor
1
0
0
1 OFF disabled disabled 9.8304 2.4576 9600
MHz
MHz
Forced V_DD V_DD $FFFF
1
0
X
X OFF disabled disabled 9.8304 2.4576 9600
Monitor
(blank)
MHz
MHz
GND
ON disabled disabled
—
Nominal Nominal
1.6 MHz 6300
User V_DD V_DD not
X
X
X
X
ON enabled enabled
—
Nominal Nominal
$FFFF
1.6 MHz 6300
(not
blank)
Notes
19. PTA0 must have a pull-up resistor to V_DD in monitor mode
20. External clock is a 4.9152 MHz, 9.8304 MHz or 19.6608 MHz canned oscillator on OCS1
21. Communication speed with external clock is depending on external clock value. Baud rate is bus frequency / 256
22. X = don’t care
23. V_TST is a high voltage V_DD + 3.5 V V_TST  V_DD + 4.5 V
Analog Integrated Circuit Device Data
Freescale Semiconductor
908E626
33