82C900 Datasheet, PDF (20/29 Pages) Infineon Technologies AG – Standalone TwinCAN Controller

82C900
Preliminary
AC Characteristics
Operating Conditions apply.
Table 6
External Clock Drive XTAL1
Parameter
Symbol Direct Drive (1:1)
Oscillator period ¹⁾ T_CAN
High time
min.
40
10
Low time
15
1) _{The clock input signal must reach the defined levels VIL and VIH.}
max.
–
–
–
Unit
ns
ns
ns
Assuming a maximum access rate from an external host to the CAN RAM via the
communication interface (worst case, parallel interface), the CAN protocol can still be
handled on both nodes with 1 Mbps if the clock frequency f_CAN is 24 MHz. For additional
data handling features (FIFO, gateway, etc.), a higher frequency should be used, the
access rate to the device has to be reduced or a lower baud rate has to be selected.
Under worst case access conditions and CAN traffic, a baud rate of 500 kbps for each
node can be achieved with full data handling functionality with f_CAN=24 MHz.
CAN input delay, output delay: typ. 15 ns
Data Sheet
20
V 1.0D3, 2001-03