Table 6-1 lists the recommended values of the external components for the
driver.
Table 6-1 MCF8329A-Q1 External Components
| COMPONENTS |
PIN 1 |
PIN 2 |
RECOMMENDED |
| CPVDD1 |
PVDD |
GND |
X7R, 0.1μF, >2x PVDD-rated |
| CPVDD2 |
PVDD |
GND |
≥ 10μF, >2x PVDD-rated |
| CCP |
CPH |
CPL |
X7R, 470nF, PVDD-rated |
| CAVDD |
AVDD |
AGND |
X7R, 1μF or 2.2μF, 10V |
| CGVDD |
GVDD |
GND |
X7R, ≥10uF, 30V |
| CDVDD |
DVDD |
DGND |
X7R, 1μF, 10V |
| CBSTx |
BSTx |
SHx |
X7R, 1μF, 25V |
| RnFAULT |
1.8 to 5 V Supply |
nFAULT |
5.1kΩ, Pullup resistor |
| RFG |
1.8 to 5 V Supply |
FG |
5.1kΩ, Pullup resistor |
| RSDA |
1.8 to 5 V Supply |
SDA |
5.1kΩ, Pullup resistor |
| RSCL |
1.8 to 5 V Supply |
SCL |
5.1kΩ, Pullup resistor |
| RDIR |
DIR |
AGND |
Optional ≤ 10kΩ resistor for better noise immunity, if DIR pin is used |
Note:
- AVDD and DVDD capacitors should have an effective capacitance between 0.5μF and 2.8μF
after operating voltage (AVDD or DVDD) and temperature derating.
- The internal pull-up resistor (to AVDD)
for both FG and nFAULT pins can be enabled by configuring PULLUP_ENABLE to 1b. Any
change to this bit needs to be written to EEPROM followed by a power recycle to take
effect. When PULLUP_ENABLE is set to 1b, no external pull-up resistor should be
provided.
- The FG and nFAULT pins needs to be
pulled high prior to the device entering active state if the external supply is used
with external pull up and with internal pull up disabled.
- DIR pin has an internal pull-down resistor of 100-kΩ.
When this pin is used, an additional pull-down resistor of 10-kΩ may be added externally
for additional noise immunity.
- SPEED/WAKE pin has an internal
pull-down resistor of 1-MΩ. In analog speed input mode, a suitable R-C filter can be
added externally to reduce noise. In PWM speed input mode, SPEED_PIN_GLITCH_FILTER can
be appropriately configured for glitch rejection.