Intel 8XC196NT, 87C196CB user manual Configuring Message Objects, CANMSK15 †

87C196CB SUPPLEMENT

CAN_MSK15 †	Address:	1E0FH, 1E0EH,
(87C196CB)		1E0DH, 1E0CH
	Reset State:	Unchanged

Program the CAN message 15 mask (CAN_MSK15) register to mask (“don’t care”) specific message identifier bits for message 15 in addition to those bits masked by a global mask (CAN_EGMSK or CAN_SGMSK).

	31
87C196CB	MSK4	MSK3	MSK2	MSK1
	23
	MSK12	MSK11	MSK10	MSK9
	15
	MSK20	MSK19	MSK18	MSK17
	7
	MSK28	MSK27	MSK26	MSK25

24

MSK0 — — —

16

MSK8 MSK7 MSK6 MSK5

8

MSK16 MSK15 MSK14 MSK13

0

MSK24 MSK23 MSK22 MSK21

Bit			Function
Number
31:27	MSK4:0	ID Mask
		These bits individually mask incoming message identifier (ID) bits.
		0	= mask the ID bit (accept either “0” or “1”)
		1	= accept only an exact match
26:24	—	Reserved. These bits are undefined; for compatibility with future devices,
		do not modify these bits.
23:16	MSK12:5	ID Mask
15:8	MSK20:13	These bits individually mask incoming message identifier (ID) bits.
7:0	MSK28:21
		0	= mask the ID bit (accept either “0” or “1”)
		1	= accept only an exact match

†Setting a CAN_MSK15 bit in any position that is cleared in the global mask register has no effect. The message 15 mask is ANDed with the global mask, so any “don’t care” bits defined in a global mask are also “don’t care” bits for message 15.

Figure 7-11. CAN Message 15 Mask (CAN_MSK15) Register

7.5CONFIGURING MESSAGE OBJECTS

Each message object consists of a configuration register, a message identifier, control registers, and data registers (from zero to eight bytes of data). This section explains how to configure mes- sage objects and determine their status.

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