MK50H25DIP ST Microelectronics, Inc., MK50H25DIP Datasheet - Page 19

• Manufacturer Part Number: MK50H25DIP
• Description: High Speed Link Level Controller
• Manufacturer: ST Microelectronics, Inc.

07
06
PLOST
PAV
2
3
4
5
6
7
8
9
10
11
12
13
14
Init: Instructs the MK50H25 to read the Initialization Block from memory.
Valid only in the Stopped mode or phase. This should be performed
prior to the Start primitive after a bus reset or power-up.
Trans: Instructs MK50H25 to enter the Transparent Mode of operation.
Data frames are transmitted and received out of the descriptor rings
with no Address and Control fields prepended to the frames. If the
PROM bit is set in the Protocol Parameters register, then no address
filtering is performed on received frames. Transparent Mode may be
exited with a Stop primitive or by a bus reset. Exiting from Transparent
Mode to the information transfer phase (link connected) is possible by
issuing a Start primitive with UPARM = 1, or to the Disconnected phase
by issuing Start with UPARM = 0.
Status Request: Instructs the MK50H25 to write the current chip status
into the STATUS BUFFER. Valid in all states, but only after the Init
primitive has been previously issued.
Self-Test Request: Instructs the MK50H25 to perform the built in internal
self test. Valid only in the Stopped phase. A Self Test primitive issued
with UPARM=3 will cause the device to identify itself by returning a
Provider primitive of 5 (or 7 for the MK50H27, etc). See section 4.4.12
for the self test procedure.
Connect Request: Instructs the MK50H25 to attempt to establish a logical
link with the remote station. Valid only in Disconnected phase .
Connect Response: Indicates willingness to establish a logical link with
the remote station. Valid only in Disconnected phase after receiving a
Connect Indication primitive.
Reset Request: If a logical link has been established, it instructs the
MK50H25 to attempt to reset the current link with the remote station. In
Transparent Mode or Disconnected Phase, it instructs the MK50H25 to
start the T1 timer (to be used as a general purpose timer).
Reset Response: If a logical link has been established, it indicates
willingness to reset the current logical link with remote station. Valid
only after receiving Reset Indication primitive. In Transparent Mode or
Disconnected Phase, it instructs the MK50H25 to stop the T1 timer.
XID Request: Instructs the MK50H25 to send a XID frame to the remote
station. Data in the XID/Test Transmit buffer is used for the Data Field.
Invalid in Stopped Mode.
XID Response: Instructs the MK50H25 to send an XID response frame to
the remote station. Data in the XID/TEST Transmit buffer is used for
the data field. Valid only after receiving an XID Indication primitive.
TEST Request: Instructs MK50H25 to send a TEST command to the
remote station. Data in the XID/TEST Transmit buffer is used for the
data field. Invalid in Stopped mode.
TEST Response: Instructs MK50H25 to send a TEST response frame to
the remote station. Data in XID/TEST Transmit buffer is used for the
data field. Valid only after receiving TEST Indication primitive.
Disconnect Request: Instructs the MK50H25 to disconnect the current
logical link and enter the Normal Disconnected phase. If the link is cur-
rently disconnected, issuing Disconnect Request with UPARM=0 will
cause a DM/F=0 frame to be sent; issuing it with UPARM=1 will cause
a DISC/P=0 frame to be sent.
PROVIDER PRIMITIVE LOST is set by the MK50H25 when a provider
primitive cannot be issued because the PAV bit is still set from the pre-
vious provider primitive. PLOST is cleared when PAV is cleared or by
a Bus RESET. Writing to this bit has no effect.
PROVIDER PRIMITIVE AVAILABLE is set by the MK50H25 when a new
provider primitive has been placed in PPRIM. PAV is READ/CLEAR
MK50H25
19/64