Interface MCA-E4852A, User Manual

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MCA-E4852A Ver. 1.1
-9- Interface Corporation
3.5 CAN Controller Access
3.5.1 Basic Mode
The CBI-4852A can directly access all registers of the SJA1000 CAN controller. Moreover, an interrupt
request is issued for CardBus by the controller interrupt signal. Basic CAN mode and Peli CAN mode are
selectable.
•
Basic CAN mode
It is the mode with the conventional PCA82C200 CAN controller (Royal Philips Electronics or
equivalent) and compatibility. The contents of a register and arrangement are the same.
•
Peli CAN mode
It is the mode which added the extended function to the conventional CAN controller. It has such
function as 64 bytes of receive FIFO. More advanced communications control can be performed by using
an extended function.
C
ard
Bu
s b
rid
ge
c
ircu
it
Co
ntr
ol
cir
cu
it
Car
dB
us
CA
N co
ntr
ol
ler
Interrupt
Register access
3.5.2 FIFO Mode
In FIFO mode, the following functions are provided:
•
Transmit message FIFO or pseudo message transmit for transmit
•
Reseive message FIFO for receive
•
Error status FIFO for error control
These modes require accesses to the CAN controller in the internal control. Therefore, direct accesses to some
part of registers of the CAN controller are forbidden.
C
ard
Bu
s b
rid
ge
c
ircu
it
Co
ntr
ol
cir
cu
it
Car
dB
us
CA
N co
ntr
ol
ler
Interrupt
Register access
FIFO
control
circuit
FIFO
Register access
Interrupt
Notes:
•
When using our driver software, this card can be used regardless of CAN controller modes. Moreover,
driver software cannot control CAN controller directly.
•
Do not use our driver software. When controlling this card directly, refer to the data sheet of the SJA1000
CAN controller or I/O map.