Datasheet

MCP2515
DS21801E-page 66 © 2007 Microchip Technology Inc.
FIGURE 12-5: LOAD TX BUFFER
FIGURE 12-6: REQUEST-TO-SEND (RTS) INSTRUCTION
FIGURE 12-7: BIT MODIFY INSTRUCTION
SO
SI
SCK
CS
0 234567891011121314151
ac00010b
76543210
instruction
data in
high-impedance
a b c Address Points to Addr
000TX buffer 0, Start at
TXB0SIDH
0x31
001TX buffer 0, Start at
TXB0D0
0x36
010TX buffer 1, Start at
TXB1SIDH
0x41
011TX buffer 1, Start at
TXB1D0
0x46
100TX buffer 2, Start at
TXB2SIDH
0x51
101TX buffer 2, Start at
TXB2D0
0x56
SO
SI
SCK
CS
0 2345671
T2 T000
0
01
instruction
high-impedance
T1
SO
SI
SCK
CS
0 23456789101112131415161718192021221
1100000
A7 6 5 4
1
A0
76543210
instruction
high-impedance
32
0
address byte
mask byte
76543210
23 24 25 26 27 28 29 30 31
data byte
Note: Not all registers can be accessed with
this command. See the register map for a
list of the registers that apply.