33912 Datasheet, PDF (4/47 Pages) Freescale Semiconductor, Inc – LIN System Basis Chip with DC Motor Pre-driver and Current

PIN CONNECTIONS
Table 1. 33912 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page 21.
Pin
Pin Name
Formal Name
Definition
12
WDCONF
Watchdog
Configuration Pin
This input pin is for configuration of the watchdog period and allows the
disabling of the watchdog.
13
LIN
LIN Bus
This pin represents the single-wire bus transmitter and receiver.
This pin is the device LIN ground connection. It is internally connected to the
14
LGND
LIN Ground Pin
PGND pin.
15
ISENSEL
Current Sense Pins Current Sense differential inputs.
16
ISENSEH
17
LS2
Low Side Outputs ^{Relay drivers low side outputs.}
19
LS1
This pin is the device low side ground connection. It is internally connected to
18
PGND
Power Ground Pin _{the LGND pin.}
20
L4
21
L3
These pins are the wake-up capable digital inputs⁽¹⁾. In addition, all Lx inputs
22
L2
Wake-Up Inputs
can be sensed analog via the analog multiplexer.
23
L1
24
HS2
High Side Outputs High side switch outputs.
25
HS1
26
VS2
These pins are device battery level power supply pins.VS2 is supplying the
27
VS1
Power Supply Pin _{HSx drivers while VS1 supplies the remaining blocks.}(2)
29
VSENSE
Voltage Sense Pin ^{Battery voltage sense input.(3)}
30
HVDD
Hall Sensor Supply _{+5.0V switchable supply output pin.}(4)
Output
31
VDD
Voltage Regulator
Output
+5.0V main voltage regulator output pin.⁽⁵⁾
32
AGND
Analog Ground Pin ^{This pin is the device analog ground connection.}
Notes
1. When used as digital input, a series 33kΩ resistor must be used to protect against automotive transients.
2. Reverse battery protection series diodes must be used externally to protect the internal circuitry.
3. This pin can be connected directly to the battery line for voltage measurements. The pin is self protected against reverse battery
connections. It is strongly recommended to connect a 10kΩ resistor in series with this pin for protection purposes.
4. External capacitor (1µF < C < 10µF; 0.1Ω < ESR < 5Ω) required.
5. External capacitor (2µF < C < 100µF; 0.1Ω < ESR < 10Ω) required.
33912
4
Analog Integrated Circuit Device Data
Freescale Semiconductor