TMC2072_07 SMSC [SMSC Corporation], TMC2072_07 Datasheet - Page 65

• Manufacturer Part Number: TMC2072_07
• Manufacturer: SMSC [SMSC Corporation]

Peripheral Mode CircLink™ Controller
Datasheet
3.2.2
SMSC TMC2072
COMR1 Register: Diagnostic/Command Register
- When reading: ARCNET diagnostic register
MY-RECON (bit 7)
When this bit is 1, it indicates that the local reconfiguration timer has timed out. This timeout sends a
reconfiguration burst signal. It is read after an interrupt has been generated by setting RECON bit = 1.
(RECON bit = 1 is set after MY-RECON bit is set to 1.) The bit is cleared by software reset or by being
read.
DUPID (bit 6)
When this bit is 1 in the offline state (TXEN = 0), it indicates that a duplicate node ID exists on the network.
In this state, the network cannot be accessed (TXEN = 1). Check that all the node ID settings are correct.
In the online state (TXEN = 1), this bit is set to 1 every time a token addressed to it is received**. This bit is
cleared by a software reset or by being read.
** Disregard this first setting of DUPID=0 -> 1. The second setting indicates a token addressed to its own
CircLink.
RCVACT (bit 5)
When this bit is 1, it indicates that activity has been detected at the CircLink receive input. This bit is
cleared by a software reset or by being read.
TOKEN (bit 4)
When this bit is 1, it indicates that a token signal on the network has been detected. Note that the token
signal sent by this bit cannot be detected. This bit is cleared by a software reset or by being read.
*1 Not equivalent to the ARCNET original specifications.
*1
COMR1
[READ]
COMR1
[WRITE]
15-8
15-8
7-0
bit
bit
7
6
5
4
3
2
1
0
(Diagnostic Register)
name
--------
MY-RECON
DUPID
RCVACT
TOKEN
EXCNAK
TENTID
NXTIDERR
--------
(Command Register)
name
--------
D7-0
DATASHEET
init. value
init. value
--
--
0
0
0
0
0
0
0
0
0
Page 65
Description
reserved (all "0")
My Reconfiguration
Duplicate ID
Receive Activity
Token Seen
Excessive NAK
Tentative ID
New Next ID
Reserved
Description
Reserved (all "0")
D7-0
address:02h
address:02h
Revision 0.1 (06-07-07)