MC33899 Freescale Semiconductor, MC33899 Datasheet - Page 16

• Manufacturer Part Number: MC33899
• Description: Programmable H-Bridge Power IC
• Manufacturer: Freescale Semiconductor

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the input data from the DI input until
from a logic [0] to a logic [1].
CS
are within the normal operating range. When active, the
output is “rail to rail”, depending on the voltage at the VDDQ
pin.
LOGIC OUT BIAS (VDDQ)
out buffer and LS Comparator. It must be connected to the
16
33899
FUNCTIONAL DESCRIPTION
FUNCTIONAL PIN DESCRIPTION
The DO output pin is in a high impedance condition unless
The VDDQ input pin provides the bias voltage for the data
is low, at least one enable pin is high and VCC and VCCL
CS
DI/
SCLK
DO
SCLK
DI/
DO
CS*
Fault/Temperature Data (1 Byte)
Fault/Temp Data (1 Byte)
CS
Not Used (1 Byte)
Not Used (1 Byte)
eventually transitions
Figure 10. SPI Operation with Extended
SERIAL DATA INPUT (DI)
is asserted (low). The MSB is the first bit of each word
received on DI and the LSB is the last bit of each word
received on DI. The 33899 serially wraps around the DI input
bits to the DO output after the DO output transmits its fault
flag bits. The first 8 bits before
the Control register. Any bytes transmitted before the last 8
bits are just wrapped around to the DO output and are not
used by the 33899 (see
allow proper operation with microprocessors using a 3.3 V to
5.0 V supply.
same power supply that is used by the microprocessor’s SPI
I / O.
DI Control Register (1 Byte)
The DI input takes data from the microprocessor while
This pin has TTL-level compatible input voltages, which
DI Control Register (1 Byte)
First DI Byte
1st DI Byte
CS
Analog Integrated Circuit Device Data
Figure
CS
10).
goes high are latched into
Freescale Semiconductor
CS