PEB24911HV13 Lantiq, PEB24911HV13 Datasheet - Page 43

• Manufacturer Part Number: PEB24911HV13
• Manufacturer: Lantiq

Specifications of PEB24911HV13

• Lead Free Status / Rohs Status: Supplier Unconfirmed

PEF 24911
Functional Description
3.4
General Purpose I/Os
The DFE-Q V2.1 features 6 general purpose I/O pins per line port. This way transparent
®
control of test relays and power feeding circuits is possible via the IOM
-2 Monitor
channel. Four of the six pins are outputs, two are inputs.
Setting Relay Driver Pins
Four relay driver output pins Dij (where i = 0, 1, 2, 3 denotes the line port no. and j = A,
B, C, D specifies the pin) are available per line port. The logic state of the four relay driver
outputs which are assigned to the same line port can be set by a single MON-8
command, called ’SETD’. The value is latched as long as no other SETD command with
different relay driver settings is received.
The state of the relay driver pins is not affected by any software reset (C/I= RES). The
state of all relay driver pins after hardware reset is „low“.
Reading Status Pins
Each line port owns two status pins ST
(where i = 0,1, 2, 3 denotes the line port no. and
ij
j = 0, 1 specifies the pin) whose logical value is reported in the associated Monitor
channel. Any signal change at one of the status pins ST1..4 causes automatically the
issue of a two-byte MON-8 message ’AST’ whose two least significant bits reflect the
status of pin STij.
However, this automatic mechanism is only enabled again, if the previous status pin
message has been transferred and acknowledged correctly according to the Monitor
®
channel handshake protocol. It takes the DFE-Q V2.1 at least 8x IOM
-2 frames (1 ms)
to transmit the 2-byte MON-8 message. Thus, repeated changes within periods shorter
®
than 8x IOM
-2 frames will overwrite the status pin register information. For this reason
only the value of the last recent status change will be reported. Note that the MON-8
transfer time depends also on the reaction time (acknowledge by MR-bit) of the DFE-Q
counterpart.
Besides this automatic report the DFE-Q V2.1 will issue the status pin Monitor message
’AST’ upon the MON-8 request ’RST’ .
The ST
pins have to be tied to either VDD or GND, if they are not used.
ij
Data Sheet
33
2001-07-16