TABLE 4-3:

COMMAND MESSAGES (EXTENDED IDENTIFIER)

Information Request Messages (to MCP2502X/5X)

Standard ID

Extended ID

Data Bytes

1

0

9 8765 4321 0R

T

R

I

D

E

DLC

1

7

1

6

RXBEID8

(8 bits)

RXBEID0

(8 bits)

Read A/D Regs

x x xxxx xxxx x 11 1 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 xxxx xxxx x 11 0 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 xxxx xxxx x 11 0 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 xxxx xxxx x 11 0 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 xxxx xxxx x 11 0 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 xxxx xxxx x 11 1 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 xxxx xxxx x 11 1 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 xxxx xxxx x 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

9876 5432 1 0 R

T

R

I

D

E

DLC

1

7

1

6

RXBEID8

(8 bits)

RXBEID0

(8 bits)

Read A/D Regs

x xxxx xxxx x x 01 1 0 0 0 8

x x xxxx xxxx

xxxx *000

IOINTFL

GPIO

AN0H

AN1H

AN10L

AN2H

AN3H

AN32L

Read Control Regs

x xxxx xxxx x x 01 0 1 1 1 7

x x xxxx xxxx

xxxx *001

ADCON0

ADCON1

OPTREG

OPTREG

STCON

IOINTEN

IOINTPO

n/a

Read Config Regs

x xxxx xxxx x x 01 0 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 xxxx xxxx x x 01 0 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 xxxx xxxx x x 01 0 1 1 0 6

x x xxxx xxxx

xxxx *100

PR1

PR2

T1CON

T2CON

PWM1D

PWM2D

n/a

n/a

Read User Mem

x xxxx xxxx x x 01 1 0 0 0 8

x x xxxx xxxx

xxxx *101

USERID0 USERID1 USERID2 USERID3 USERID4 USERID5 USERID6 USERID7

Read User Mem

x xxxx xxxx x x 01 1 0 0 0 8

x x xxxx xxxx

xxxx *110

USERID8 USERID9 USERID1 USERID1 USERID1 USERID1 USERID1 USERID1

Read Register

x xxxx xxxx x x 0 1 0 0 0 0 1x x

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

9876 5432 1 0 R

T

R

I

D

E

DLC

1

7

1

6

RXBEID8

(8 bits)

RXBEID0

(8 bits)

Write Register

x xxxx xxxx x x 0 1 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 xxxx xxxx x x 0 1 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 xxxx xxxx x x 0 1 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 xxxx xxxx x x 0 1 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- x xxxx xxxx x x 0 1 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

x xxxx xxxx x x 0 1 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

x xxxx xxxx x x 0 1 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

x xxxx xxxx x x 0 1 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.