Bosch TTCAN - Page 59

User’s Manual
BOSCH
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Revision 1.6TTCAN
11.11.02
manual_about.fm
Figure 17: CPU Handling of a FIFO Buffer (Interrupt Driven)
Read Interrupt Pointer
START
case Interrupt Pointer
0x8000h else 0x0000h
Status Change
END
IFx Command Mask = 0x007F
Write MessageNum to IFx Command Request
(Transfer Message to IFx Registers,
Clear NewDat and IntPnd)
Read IFx Message Control
NewDat = 1
Read Data from IFx Data A,B
EoB = 1
MessageNum = MessageNum + 1
Yes
No
Yes
No
Message Interrupt
Interrupt Handling
MessageNum = Interrupt Pointer