Features
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Fully Compliant to VAN Specification ISO/11519-3
Handles All Specified Module Types
Handles All Specified Message Types
Handles Retransmission of Frames on Contention and Errors
3 Separate Line Inputs with Automatic Diagnosis and Selection
Normal or Pulsed (Optical and Radio Mode) Coding
VAN Transfer Rate: 1 Mbit/s Maximum
SPI/SCI Interface
SPI Transfer Rate: 4 Mbits/s Maximum
SCI Transfer Rate: 125 Kbits/s Maximum
Idle and Sleep Modes
128 Bytes of General Purpose RAM
14 Identifier Registers with All Bits Individually Maskable
6-source Maskable Interrupt Including an Interrupt-on-reset to Detect Glitches on the
Reset Pin
Integrated Crystal or Resonator Oscillator with Internal Baud Rate Generator and
Buffered Clock Output
Single +5V Power Supply
0.5
μm
CMOS Technology
SO16 Package
VAN Data Link
Controller with
Serial Interface
TSS463C
Description
The TSS463C is a circuit that allows the transfer of all the status information needed
in a car or truck over a single low-cost wire pair, thereby minimizing electrical wire
usage. It can be used to interconnect powerful functions and to control and interface
car body electronics (lights, wipers, power window, etc.).
The TSS463C is fully compliant with the VAN ISO standard 11519-3. This standard
supports a wide range of applications such as low-cost remote controlled switches,
typically it is used for lamp control, up to complex, highly autonomous, distributed sys-
tems that require fast and secure data transfers.
The TSS463C is a microprocessor-interfaced line controller for mid-to-high complexity
bus-masters and listeners like dashboard controllers, car stereo or mobile telephone
CPUs.
The microprocessor interface consists of a 256-byte RAM and a register area divided
into 11 control registers, 14 channel register sets and 128 bytes of general-purpose
RAM, used as a message storage area, and a 6-source maskable interrupt.
The circuit operates in the RAM using DMA techniques, controlled by the channel and
control registers. This allows virtually any microprocessor, including SPI/SCI interface,
to be connected with ease to the TSS463C.
Messages are encoded in enhanced Manchester code, and an optional pulsed code
for use with an optical or radio link, at a maximum bit rate of 1 Mbit/s. The TSS463C
analyzes the messages received or transmitted according to 6 different criteria includ-
ing some higher level checks.
In addition, the bus interface has three separate inputs with automatic source diagno-
sis and selection, allowing for multibus listening or the automatic selection of the most
reliable source at any time if several line receivers are connected to the same bus.
7601B–AUTO–02/06
1
Application
The TSS463C is a microprocessor controlled line controller for the VAN bus. It can inter-
face to virtually any microprocessor that includes SPI or SCI interface.
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The TSS463C provides one full Motorola© compatible SPI interface.
It includes one full compatible Intel
®
UART (mode 0 only).
One 9-bits SCI interface is also integrated.
The circuit also features a single interrupt pin. This pin can be treated as level sensitive,
i.e. if there is a pending interrupt inside the circuit when another interrupt is reset the INT
pin will emit a high pulse with the same pulse width as the internal write strobe (typically
20 ns).
Figure 1.
Typical Application With Motorola SPI Mode
Remaining pins
SCLK
MOSI
MISO
(2)
PORT X.Y
IRQ
General I/O
(if needed)
100K
MISO
1
SS
INT
2
16
15
SCLK
RESET
(1)
mC
Microcontroller
MOSI
TSS463
3
VDD
4
5
6
14
13
12
11
10
9
RxD0
RxD2
RxD1
VAN Bus
GND
TxD
CKOUT
XTAL1
XTAL2
RESET
(1)
TEST/VSS
7
CKOUT
8
Notes:
1. The TSS463C RESET pin can be either connected to GND through a 1 µF capacitor,
or the µC RESET pin or unconnected (inactive with internal pull-up).
2. Leaving MISO output pin floating in high impedance mode slightly increases standby
consumption. A 100KΩ pullup/pulldown resistor is recommended.
4
TSS463C
7601B–AUTO–02/06
TSS463C
Microprocessor
Interface
Interface Modes
Motorola SPI Mode
The processor controls the TSS463C by reading and writing the internal registers of the
circuit. These registers appear to the processor as regular memory locations.
The TSS463C must be connected with an SPI or SCI serial interface.The following sec-
tion provides information switching from one mode to another.
The first two bytes to be sent by the master (CPU) are called ’Initialization Sequence’:
This sequence provides a proper asynchronous RESET in the TSS463C and it selects
the Motorola SPI, Intel SPI or the SCI serial mode. This initialization sequence is shown
on figure 4: two 0x00 will cause an internal RESET and assert the Motorola SPI mode,
two ’0xFF’ will provide an internal RESET and assert the Intel SPI mode and ’9 bits to 0
followed by 0xFF or 0xFE’will generate an internal RESET and assert the 9-bits SCI
mode.
Figure 2.
Mode Configuration Byte
SPI 8 Pulses
SCLK
MOSI
0x00
or 0xFF
0x00
0xFF
Motorola
Intel
SS
Internal RESET
Internal RESET and SPI Mode (Intel or Motorola)
SCI 9 Pulses
SCLK
MOSI
0 . 0000 . 0000
1 . 1 . 1111
111
SS
Internal RESET
Internal RESET and SCI Mode
The Motorola Serial Peripheral Interface (SPI) is fully compatible with the SPI Motorola
protocol. The interface is implemented for slave-mode only (the TSS463C can not gen-
erate SPI frames by itself).
The SPI interface allows the interconnection of several CPUs and peripherals on the
same printed circuit board.
The SPI mode interface consists of 4 pins: separate wires are required for data and
clock, so the clock is not included in the data stream as shown on Figure 3. One pin is
needed for the serial clock (SCLK), two pins for data communication MOSI and MISO
and one pin for Slave Select (SS)
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7601B–AUTO–02/06
微控制器 MCU
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