TABLE 4-2:

COMMAND MESSAGES (STANDARD IDENTIFIER)

Information Request Messages (to MCP2502X/5X)

Standard ID

Data Bytes

1

0

98 76543 210

R

T

R

I

D

E

DLC

Read A/D Regs

xxxx xxx * 0 0 0 1*

0 1 0 0 0

8*

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

Read Control Regs

xxxx xxx * 0 0 1 1*

0 0 1 1 1

7*

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

Read Config Regs

xxxx xxx * 0 1 0 1*

0 0 1 0 1

5*

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

Read CAN Error

xxxx xxx * 0 1 1 1*

0 0 0 1 1

3*

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

Read PWM Config

xxxx xxx * 1 0 0 1*

0 0 1 1 0

6*

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

Read User Mem (bank1)

xxxx xxx * 1 0 1 1*

0 1 0 0 0

8*

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

Read User Mem (bank 2)

xxxx xxx * 1 1 0 1*

0 1 0 0 0

8*

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

Output Messages (from MCP2502X/5X)

Standard ID

Data Bytes

1

0

98 765 43 21 0 R

T

R

I

D

E

DLC

Read A/D Regs

x

x

x

x

x

x

x

*

0 0 0 00 1 0 0 0 8

IOINTFL

GPIO

AN0H

AN1H

AN10L

AN2H

AN3H

AN32L

Read Control Regs

x

x

x

x

x

x

x

*

0 0 1 00 0 1 1 1 7

ADCON0

ADCON1

OPTREG

OPTREG

STCON

IOINTEN

IOINTPO

n/a

Read Config Regs

x

x

x

x

x

x

x

*

0 1 0 00 0 1 0 1 5

DDR

GPIO

CNF1

CNF2

CNF3

n/a

n/a

n/a

Read CAN Error

x

x

x

x

x

x

x

*

0 1 1 00 0 0 1 1 3EFLG

TEC

REC

n/a

n/a

n/a

n/a

n/a

Read PWM Config

x

x

x

x

x

x

x

*

1 0 0 00 0 1 1 0 6

PR1

PR2

T1CON

T2CON

PWM1DC

PWM2DC

n/a

n/a

Read User Mem (bank1)

x

x

x

x

x

x

x

*

1 0 1 00 1 0 0 0 8

USERID0

USERID1

USERID2

USERID3

USERID4

USERID5

USERID6

USERID7

Read User Mem (bank 2)

x

x

x

x

x

x

x

*

1 1 0 00 1 0 0 0 8

USERID8

USERID9

USERID1

USERID1

USERID1

USERID1

USERID1

USERID1

Input Messages** (to MCP2502X/5X)

Standard ID

Data Bytes

1

0

98 765 43 21 0 R

T

R

I

D

E

DLC

Write Register

x

x

x

x

x

x

x

x 0 0 0 00 0 0 1 1 3

addr

mask

value

n/a

n/a

n/a

n/a

n/a

Write TX Message ID 0

x

x

x

x

x

x

x

x 0 0 1 00 0 1 0 0 4

TX0SIDH

TX0SIDL

TX0EID8

TX0EID0

n/a

n/a

n/a

n/a

Write TX Message ID 1

x

x

x

x

x

x

x

x 0 1 0 00 0 1 0 0 4

TX1SIDH

TX1SIDL

TX1EID8

TX1EID0

n/a

n/a

n/a

n/a

Write TX Message ID 2

x

x

x

x

x

x

x

x 0 1 1 00 0 1 0 0 4

TX2SIDH

TX2SIDL

TX2EID8

TX2EID0

n/a

n/a

n/a

n/a

Write I/O Configuration

x

x

x

x

x

x

x

x 1 0 0 00 0 1 0 1 5

IOINTEN

IOINTPO

DDR

OPTREG

ADCON1

n/a

n/a

n/a

Write RX Mask

x

x

x

xxx

xx 1 0 1 00 0 1 0 0 4 RXMSIDH

RXMSIDL

RXMEID8

RXMEID0

n/a

n/a

n/a

n/a

Write RX Filter0

x

x

x

x

x

x

x

x 1 1 0 00 0 1 0 0 4

RXF0SID

RXF0SID

RXF0EID

RXF0EID

n/a

n/a

n/a

n/a

Write RX Filter1

x

x

x

x

x

x

x

x 1 1 1 00 0 1 0 0 4

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.