908E624_10 Datasheet, PDF (32/40 Pages) Freescale Semiconductor, Inc – Integrated Triple High Side Switch with Embedded MCU and LIN Serial Communicationfor Relay Drivers

TYPICAL APPLICATIONS
PCB Level Programming
If the IC is soldered onto the PCB board it is typically not
possible to separately power the MCU with +5.0 V, the whole
system has to be powered up providing V_SUP (see
Figure 19).
VSUP
+
47µF
100nF
VSUP[1:2]
GND
VDD
VDD
AGND
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
VDD
10k
VREFH
RST
VDDA
RST_A
EVDD
100nF
VTST
IRQ
VREFL
MM908E624
VSSA
2.2k
IRQ_A
EVSS
9.8304MHz CLOCK
CLK _PTC4/OSC1
DATA _PTA0/KBD0
10k
PTB4/AD4
10k
PTA1/KBD1
10k
PTB3/AD3
WDCONF
4.7µF
VDD
Figure 19. Normal Monitor Mode Circuit
Table 14 summarizes the possible configurations and the
necessary setups.
Table 14. Monitor Mode Signal Requirements and Options
Serial
Mode
Communication Selection
Mode
IRQ RST WDCONF
Reset
Vector
ICG
PTA0 PTA1 PTB3 PTB4
COP
Normal
Request
Timeout
Communication Speed
External
Clock
Bus
Frequenc
y
Baud
Rate
Normal
Monitor
V_TST V_DD
GND
X
1
0
0
1
OFF disabled disabled
9.8304
MHz
2.4576
MHz
9600
V_DD
Forced
Monitor
V_DD
GND
$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
User V_DD V_DD
not $FFFF
R_EXT
(not blank)
X
X
X
X
ON enabled enabled
—
Nominal Nominal
1.6MHz
6300
Notes
32. PTA0 must have a pullup resistor to V_DD in monitor mode.
33. External clock is a 4.9152 MHz, 9.8304 MHz or 19.6608 MHz canned oscillator on OCS1.
34. Communication speed with external clock is depending on external clock value. Baud rate is bus frequency / 256.
35. X = don’t care.
36. V_TST is a high voltage V_DD + 3.5 V ≤ V_TST ≤ V_DD + 4.5 V.
908E624
32
Analog Integrated Circuit Device Data
Freescale Semiconductor