mm908e626 Freescale Semiconductor, Inc, mm908e626 Datasheet - Page 31

• Manufacturer Part Number: mm908e626
• Description: Integrated Stepper Motor Driver With Embedded Mcu And Lin Serial Communication
• Manufacturer: Freescale Semiconductor, Inc

system has to be powered up providing V
Figure
necessary setups.
Analog Integrated Circuit Device Data
Freescale Semiconductor
Table 7
RS232
2
3
5
DB-9
Notes
16).
Monitor
Monitor
Normal
Forced
Mode
User
1.
2.
3.
4.
5.
summarizes the possible configurations and the
1µF
1µF
PTA0 must have a pullup resistor to V
External clock is a 4.9152MHz, 9.8304MHz or 19.6608MHz canned oscillator on OCS1
Communication speed with external clock is depending on external clock value. Baud rate is bus frequency / 256
X = don’t care
V
TST
V
GND
+
+
IRQ RST
V
V
TST
DD
DD
is a high voltage V
1
3
4
5
7
8
C1+
C1-
C2+
C2-
T2
R2
OUT
IN
V
V
V
DD
DD
DD
MAX232
(not blank)
not $FFFF
Vector
Reset
$FFFF
(blank)
R2
X
GND
T2
V
OUT
V+
V-
CC
IN
16
15
2
6
10
9
DD
Communication
V
2
74HC125
PTA0
+ 3.5V
DD
Table 7. Monitor Mode Signal Requirements and Options
+
+
1
1
X
1
1µF
1µF
Serial
SUP
3
Figure 16. Normal Monitor Mode Circuit
≤
+
1µF
PTA1
6
V
(see
74HC125
V
DD
TST
0
0
X
SUP
4
in monitor mode
≤
5
V
PTB3
DD
Selection
X
X
0
+ 4.5V
V
Mode
DD
10k
PTB4
1
X
X
47µF
V
TST
9.8304MHz CLOCK
+
ICG
OFF
OFF
ON
ON
100nF
disabled
disabled
disabled
enabled
COP
DATA
CLK
Request
Timeout
VSUP[1:3]
GND[1:2]
RST
RST_A
IRQ
IRQ_A
PTC4/OSC1
PTA0/KBD0
Normal
disabled
disabled
disabled
enabled
FACTORY TRIMMING AND CALIBRATION
MM908E626
External
Clock
9.8304
9.8304
MHz
MHz
Communication Speed
—
—
PTA1/KBD1
PTB4/AD4
PTB3/AD3
TYPICAL APPLICATIONS
Frequency
VREFH
Nominal
Nominal
VREFL
1.6MHz
1.6MHz
2.4576
2.4576
EVDD
VDDA
VSSA
EVSS
MHz
MHz
VDD
VSS
Bus
100nF
10k
10k
10k
Nominal
Nominal
Baud
Rate
9600
9600
6300
6300
V
DD
908E626
V
4.7µF
DD
31