st5451d STMicroelectronics, st5451d Datasheet - Page 51

• Manufacturer Part Number: st5451d
• Description: 2b1q U Interface Device
• Manufacturer: STMicroelectronics

Table 8: REGISTER ACCESS MESSAGES (Continued)
Notes:
1. All transmit registers can be read-back by setting bit 7 of BYTE 1 equal 1 except for TXEOC register. To read-back TXEOC, use the command
2. BEC1, BEC2 and IDR are read-only registers.
3. FREE adresses are ignored by the device.
4. In the TXEOC register:
5. M42x is significant in NT mode only
61-00 H.
TXM4
TXM4
TXM56
TXM56
TXACT
TXACT
BEC1
BEC2
ECT1
ECT1
ECT2
ECT2
RXOH
RESERVED
TXEOC
TXEOC
RESERVED
IDR
DR
FREE
FREE
MPWS
E = ea1, the msb of the EOC destination address
F = ea2
G = ea3
H = dm, the EOC data/message mode indicator
FUNCTION
W
W
W
W
W
W
W
W
R
R
R
R
R
R
R
R
R
R
AD7/4
11XX
101X
0100
0100
0100
0100
0100
0100
0100
0100
0100
0100
0100
0100
0100
0100
0101
0110
0111
1000
1001
1111
BYTE 1
AD3/1
EFG
XXX
XXX
XXX
XXX
000
000
001
001
010
010
011
100
101
101
110
110
111
111
000
000
111
AD0
H
0
1
0
1
0
1
1
1
0
1
0
1
0
0
1
X
0
X
X
X
0
ECT17 ECT16 ECT15 ECT14 ECT13 ECT12 ECT11 ECT10
ECT27 ECT26 ECT25 ECT24 ECT23 ECT22 ECT21 ECT20
XEOC1 XEOC2 XEOC3 XEOC4 XEOC5 XEOC6 XEOC7 XEOC8
EOC
7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
M42x
M4
FF = Mode B
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
M43x
M56
5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
M44x
M51x
ACT
4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
BYTE 2
M45x
M61x
C4x
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
STATUS
M46x
M52x
00 = Mode A
C3x
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
FEBx
C2x
STLC5411
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
M48x
FEBx
RST
C1x
51/72
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0