33889 Datasheet, PDF (4/60 Pages) Freescale Semiconductor, Inc – System Basis Chip with Low Speed Fault Tolerant CAN Interface

PIN CONNECTIONS
PIN CONNECTIONS
RX ¹
TX ²
VDD1 ³
RST ⁴
INT ⁵
GND ⁶
GND ⁷
GND ⁸
GND ⁹
V2CTRL ¹⁰
VSUP ¹¹
HS1 ¹²
L0 ¹³
L1 ¹⁴
28 _WDOG
27 _CS
26 _MOSI
25 _MISO
24 _SCLK
23 _GND
22 _GND
21 _GND
20 _GND
19 _CANL
18 _CANH
17 _RTL
16 _RTH
15 _V2
Figure 2. 33889 Pin Connections
Table 2. Pin Definitions
A functional description of each pin can be found in the Functional pin description section page 24.
Pin
Pin Name
Pin
Function
1
RX
Output
2
TX
Input
Formal Name
Receiver Data
Transmitter Data
Definition
CAN bus receive data output pin
CAN bus receive data input pin
3
VDD1
Power
Voltage Regulator One ^{5.0 V pin is a 2% low drop voltage regulator for to the microcontroller}
Output
supply.
4
RST
Output
Reset
This is the device reset output pin whose main function is to reset the
MCU.
5
INT
Output
Interrupt
This output is asserted LOW when an enabled interrupt condition
occurs.
6 -9,
20 - 23
GND
Ground
Ground
These device ground pins are internally connected to the package lead
frame to provide a 33889-to-PCB thermal path.
10
V2CTRL
Output Voltage Source 2 Control Output drive source for the V2 regulator connected to the external series
pass transistor.
11
VSUP
Power
Input
Voltage Supply
Supply input pin.
12
HS1
Output
High-Side Output
Output of the internal high-side switch.
13 - 14
15
L0, L1
V2
Input
Input
Level 0 - 1 Inputs
Voltage Regulator Two
Inputs from external switches or from logic circuitry.
5.0 V pin is a low drop voltage regulator dedicated to the peripherals
supply.
16
RTH
Output
RTH
Pin for connection of the bus termination resistor to CANH.
17
RTL
Output
RTL
Pin for connection of the bus termination resistor to CANL.
18
CANH
Output
19
CANL
Output
CAN High
CAN Low
CAN high output pin.
CAN low output pin.
24
SCLK
Input
System Clock
Clock input pin for the Serial Peripheral Interface (SPI).
33889
4
Analog Integrated Circuit Device Data
Freescale Semiconductor