Datasheet

MCP2502X/5X DS21664D-page 26 © 2007 Microchip Technology Inc.
TABLE 4-3: COMMAND MESSAGES (EXTENDED IDENTIFIER)
Information Request Messages (to MCP2502X/5X)
Standard ID Extended ID Data Bytes
1
0
9876543210R
T
R
I
D
E
DLC 1
7
1
6
RXBEID8
(8 bits)
RXBEID0
(8 bits)
Read A/D Regs x x xxxxxxxxx
111 0 0 0 8* x x xxxx xxxx xxxx *000 n/a n/a n/a n/a n/a n/a n/a n/a
Read Control Regs x x xxxxxxxxx
110 1 1 1 7* x x xxxx xxxx xxxx *001 n/a n/a n/a n/a n/a n/a n/a n/a
Read Config Regs x x xxxxxxxxx
110 1 0 1 5* x x xxxx xxxx xxxx *010 n/a n/a n/a n/a n/a n/a n/a n/a
Read CAN Error x x xxxxxxxxx
110 0 1 1 3* x x xxxx xxxx xxxx *011 n/a n/a n/a n/a n/a n/a n/a n/a
Read PWM Config x x xxxxxxxxx
110 1 1 0 6* x x xxxx xxxx xxxx *100 n/a n/a n/a n/a n/a n/a n/a n/a
Read User Mem x x xxxxxxxxx
111 0 0 0 8* x x xxxx xxxx xxxx *101 n/a n/a n/a n/a n/a n/a n/a n/a
Read User Mem x x xxxxxxxxx
111 0 0 0 8* x x xxxx xxxx xxxx *110 n/a n/a n/a n/a n/a n/a n/a n/a
Read Register x x xxxxxxxxx
1 1 0 0 0 0 1* x x addr xxxx *111 n/a n/a n/a n/a n/a n/a n/a n/a
Output Messages (from MCP2502X/5X)
Standard ID Extended ID Data Bytes
1
0
9876543210R
T
R
I
D
E
DLC 1
7
1
6
RXBEID8
(8 bits)
RXBEID0
(8 bits)
Read A/D Regs x xxxxxxxxxx
011 0 0 0 8 x x xxxx xxxx xxxx *000 IOINTFL GPIO AN0H AN1H AN10L AN2H AN3H AN32L
Read Control Regs x xxxxxxxxxx
010 1 1 1 7 x x xxxx xxxx xxxx *001 ADCON0 ADCON1 OPTREG OPTREG STCON IOINTEN IOINTPO n/a
Read Config Regs x xxxxxxxxxx
010 1 0 1 5 x x xxxx xxxx xxxx *010 DDR GPIO CNF1 CNF2 CNF3 n/a n/a n/a
Read CAN Error x xxxxxxxxxx
010 0 1 1 3 x x xxxx xxxx xxxx *011 EFLG TEC REC n/a n/a n/a n/a n/a
Read PWM Config x xxxxxxxxxx
010 1 1 0 6 x x xxxx xxxx xxxx *100 PR1 PR2 T1CON T2CON PWM1D PWM2D n/a n/a
Read User Mem x xxxxxxxxxx
011 0 0 0 8 x x xxxx xxxx xxxx *101 USERID0 USERID1 USERID2 USERID3 USERID4 USERID5 USERID6 USERID7
Read User Mem x xxxxxxxxxx
011 0 0 0 8 x x xxxx xxxx xxxx *110 USERID8 USERID9 USERID1 USERID1 USERID1 USERID1 USERID1 USERID1
Read Register x xxxxxxxxxx
0 1 0 0 0 0 1xx addr xxxx *111 value n/a n/a n/a n/a n/a n/a n/a
Input Messages (to MCP2502X/5X)
Standard ID Extended ID Data Bytes
1
0
9876543210R
T
R
I
D
E
DLC 1
7
1
6
RXBEID8
(8 bits)
RXBEID0
(8 bits)
Write Register xxxxxxxxxxx01
0 0 1 1 3 x x xxxx xxxx xxxx x000 addr mask value n/a n/a n/a n/a n/a
Write TX Message x xxxxxxxxxx01
0 1 0 0 4 x x xxxx xxxx xxxx x001 TX0SIDH TX0SIDL TX0EID8 TX0EID0 n/a n/a n/a n/a
Write TX Message x xxxxxxxxxx01
0 1 0 0 4 x x xxxx xxxx xxxx x010 TX1SIDH TX1SIDL TX1EID8 TX1EID0 n/a n/a n/a n/a
Write TX Message x xxxxxxxxxx01
0 1 0 0 4 x x xxxx xxxx xxxx x011 TX2SIDH TX2SIDL TX2EID8 TX2EID0 n/a n/a n/a n/a
Write I/O Configura- xxxxxxxxxxx01
0 1 0 1 5 x x xxxx xxxx xxxx x100 IOINTEN IOINTPO DDR OPTREG ADCON1 n/a n/a n/a
Write RX Mask xxxxxxxxxxx01
0 1 0 0 4 x x xxxx xxxx xxxx x101 RXM- RXMSIDL RXMEID8 RXMEID0 n/a n/a n/a n/a
Write RX Filter0 xxxxxxxxxxx01
0 1 0 0 4 x x xxxx xxxx xxxx x110 RXF0SID RXF0SID RXF0EID RXF0EID n/a n/a n/a n/a
Write RX Filter1 xxxxxxxxxxx01
0 1 0 0 4 x x xxxx xxxx xxxx x111 RXF1SID RXF1SID RXF1EID RXF1EID n/a n/a n/a n/a
* If using non-RTR messages for information request messages (IRM), the RTR bit = 0, DLC bit field = 0, and bit 3 of the IRM ID = 1. Also, bit 3 of the output message ID = 0.
If using RTR messages for IRMs, the RTR bit = 1, DLC bit field = number of bytes in corresponding output message, and bit three of the IRM ID = x (don’t care), also, bit 3 of the
output message = x (don’t care).
** User-defined IRM IDs must be different from input message IDs to avoid message contention between the corresponding output message and the input message.