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BOSCH
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Revision 1.6TTCAN
11.11.02
manual_about.fm
3.4.5 Message Valid 1 Register
MsgVal32-1Message Valid Bits (of all Message Objects)
one
This Message Object is configured and should be considered by the Mes-
sage Handler.
zero
This Message Object is ignored by the Message Handler.
These registers hold the MsgVal bits of the 32 Message Objects. By reading out the MsgVal
bits, the CPU can check which Message Object is valid. The MsgVal bit of a specific Message
Object can be set/reset by the CPU via the IFx Message Interface Registers.
3.5 Registers for Time Triggered Communication
3.5.1 Trigger Memory Access Register (addresses 0x0F & 0x0E)
Rd/Wr Read / Write
one
Write to selected Trigger.
zero
Read from selected Trigger.
Trigger Number
0x00-0x1F
The trigger is selected for data transfer between Trigger Memory
and IF1 Message Data B1 and B2 Registers.
Note :
The CPU may access the Trigger Memory only during Configuration Mode. During active mode,
the write to the Trigger Memory Access register is locked. The Trigger Memory access is
started by a write to the low byte of the Trigger Memory Access register.
3.5.2 IF1 Data B1 and B2 Registers for Trigger Memory Access
The trigger data of the TTCAN system matrix is stored in the Trigger Memory. The Trigger
Memory is accessed via the IF1 Data B1 and B2 Registers. The data transfer is controlled by
the Trigger Memory Access Register. The bits of IF1 Data B1 and B2 Registers correspond
with the bits of a Trigger Memory word according to the following table :
Note :
Accesses to the Trigger Memory are controlled by the Trigger Memory Access Register, which
selects a word of the Trigger Memory and specifies the direction of the data transfer.
On each transfer, 32 bits are loaded either from the IF1 Data B1 and B2 Registers to the
selected Trigger Memory word or vice versa.
Message Valid 1 Register
(addresses 0xB1 & 0xB0)
1514131211109876543210
MsgVal16-9 MsgVal8-1
Message Valid 2 Register
(addresses 0xB3 & 0xB2)
MsgVal32-25 MsgVal24-17
rr
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Rd/Wr res res res res res res res res res res Trigger Number
rw rrrrrrrrrr rw
1514131211109876543210
IF1 Message Data B1 Type Message Number res Cycle_Code
IF1 Message Data B2 Time_Mark
rw rw