TSS461 ATMEL Corporation, TSS461 Datasheet - Page 5

• Manufacturer Part Number: TSS461
• Description: VAN Data Link Controller
• Manufacturer: ATMEL Corporation

Operation
Figure 2. Typical Application
4194C–AUTO–01/06
Microcontroller
Remaining Pins
RESET XTAL1 INT
TSS461E
Series
P3.6/WR
P3.7/RD
P0.7
P0.6
P0.5
P0.4
P0.3
P0.2
P0.1
P0.0
ALE
The TSS461E is a microprocessor-controlled line controller for the VAN bus. It can interface to
virtually any microprocessor, but the I/O signals of the circuit have been optimized for use with
the TSC51/TSC251 series of microcontrollers.
It features a multiplexed address and data bus, controlled by an address strobe pin ALE and
separated read RD and write WR command pins. The address is latched on the falling edge of
ALE.
The circuit also features one single interrupt pin. This pin can be treated as level or edge sensi-
tive, For example, 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).
C1
V
GND
CC
WR
RD
ALE
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
XTAL1
INT CKOUT RESET
VAN
DLC
General I/O
XTAL2
RXD0
RXD1
RXD2
TXD
CS
GND
33 pF
DATA
Differential
DATA
VAN Line Driver
& Receivers
+
+
+
-
-
-
V
REF
VAN Bus
TSS461E
5