MC34921 Datasheet, PDF (2/36 Pages) List of Unclassifed Manufacturers – Configurable Motor Driver IC with Power Supplies

INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
B+
CP1
CP2
VBOOST DGND
5 V SELECT
5 V SWITCH
5 V SUPPLY
5V
3.3 V SWITCH
3.3 V
VCORE SUPPLY
VCORE
VCORE SELECT
ENC_FILTB
ENC_FILTA
AN3/ANALOGIN_B
AN2/ANALOGIN_A
AN1/ANALOGOUT_B
AN0/ANALOGOUT_A
MISO
MOSI
SCLK
CE
GATEOUT
RST
5.0 V
Dual Mode
Regulator
B+
Charge Pump
Gate Voltage
Generator
Thermal
Shutdown
B+
3.3 V Switching
Regulator
V_CORE
Linear
Regulator
Oscillator
I/V
Converter
Motor Driver B
B+
A /D
Converter
and
Multiplexer
Motor Driver A
Serial I/O
Active Clamp
Step
Motor Driver
Gate Driver
SS DC Motor Driver
Supervisor
Circuitry
GND
Figure 2. 34921 Simplified Internal Block Diagram
BPWM
BDCMA
BDCMB
APWM
ADCMA
ADCMB
SA /CDCMA
SA /CDCMB
SB/LSOUT1
SB/LSOUT2
CPWMA /CDCPWM
CPWMB
CDCMA /HSOUT1
CDCMB /HSOUT2
34921
2
Analog Integrated Circuit Device Data
Freescale Semiconductor