TMC2074-NE SMSC, TMC2074-NE Datasheet - Page 84

• Manufacturer Part Number: TMC2074-NE
• Description: Network Controller & Processor ICs Standalone Mode CircLink Cntlr
• Manufacturer: SMSC

Specifications of TMC2074-NE

• Product: Controller Area Network (CAN)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.2.8
3.2.9
Revision 0.2 (10-23-08)
NST Register: Network Standard Time
NST15-0 (bits 15 to 0)
These bits indicate the standard time in the network. Refer to section 2.12 for details.
Accessing the NST register can dynamically provide the latest time data. Since NST is a 16 bit counter, it
is necessary to read the even address side (10h) first when an 8-bit bus is used. When the even address
side (11h) is read out, the remaining 8 bits of the NST are latched internally.
INTSTA Register: EC Interrupt Status
The upper 8 bits indicate the receive status, and the lower 8 bits indicate the send status. Every bit in this
register can be used to generate an interrupt.
RXERR (bit 15)
This bit indicates that receive has stopped due to an error during packet receive. As soon as this bit is set,
the details of the error are indicated by the RXEC 2-0 (bits 7 to 5) in the ERRINFO register, and the ID of
the sending node is stored to RESID 4-0 (bits 4 to 0) in the same register. Note that this bit is not set by
any message other than a packet (Token, FBE, ACK, or NAK).
This bit is cleared by writing 1 or by a software reset.
INTSTA
NST
15-0
bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Bit
name
RXERR
CMIECC
NSTUNLOC
WARTERR
FRCV
RRCV
MRCV
SIDF
TKNRETF
ACKNAKF
HUBWDTO
CPERR
COM
FBENR
TXERR
TA
name
NST15-0
DATASHEET
init. value
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
0000h
R/W
dir.
R
R
R
R
Page 84
init. value
description
Network Standard Time
1 or 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Description
Receiver Error
CMI RX Error Correction occurred
NST Unlock
Warning Timer Error
Free-format mode Received
Remote-buffer mode Received
My Received
SID Found
Token Retry occurred
Corrupt ACK/NAK Recovered
HUB Watch Dog Timer time-out
Tx CP Error
ARCNET CORE Interrupt
FBE No Reply
Transmitter Error
Transmitter Available
(Read Only, Read/Write)
Dual Mode CircLink™ Controller
address:10h
(Read Only)
address:12h
SMSC TMC2074
Datasheet