908E626 Datasheet, PDF (31/38 Pages) Freescale Semiconductor, Inc – Integrated Stepper Motor Driver with Embedded MCU and LIN Serial Communication

TYPICAL APPLICATIONS
FACTORY TRIMMING AND CALIBRATION
system has to be powered up providing V_SUP (see
Figure 16).
VSUP
VDD
RS232
DB-9
2
3
5
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 16. Normal Monitor Mode Circuit
Table 7 summarizes the possible configurations and the
necessary setups.
Table 7. 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
Monitor
V_TST V_DD
X
1
0
0
1
OFF disabled disabled
9.8304
MHz
2.4576
MHz
9600
V_DD
Forced
Monitor
V_DD
$FFFF
(blank)
1
GND
0
OFF disabled disabled
9.8304
MHz
2.4576
MHz
9600
X
X
ON disabled disabled
—
Nominal Nominal
1.6MHz
6300
not $FFFF
User
V_DD V_{DD (not blank)}
X
X
X
X
ON enabled enabled
—
Nominal Nominal
1.6MHz
6300
Notes
1. PTA0 must have a pullup resistor to V_DD in monitor mode
2. External clock is a 4.9152MHz, 9.8304MHz or 19.6608MHz canned oscillator on OCS1
3. Communication speed with external clock is depending on external clock value. Baud rate is bus frequency / 256
4. X = don’t care
5. V_TST is a high voltage V_DD + 3.5V ≤ V_TST ≤ V_DD + 4.5V
Analog Integrated Circuit Device Data
Freescale Semiconductor
908E626
31