PEF2091 Siemens Semiconductor Group, PEF2091 Datasheet - Page 196

• Manufacturer Part Number: PEF2091
• Description: ICs for Communications(ISDN Echocancellation Circuit)
• Manufacturer: Siemens Semiconductor Group

Semiconductor Group
LT Modes
The pin DISS is used for switching off the remote power supply of the subscriber line. It
is set to ’1’ by the C/I-command "LTD" (0011
not affect the DISS-pin. While the DISS-pin is set to (1), the device is in the "TEST" state
"State Machine in LT Modes", page 146.
4.10
Note 59: This chapter applies only in stand-alone mode.
The interface consists of three data bits PCD0 ... 2, two address bits PCA0,1, read and
write signals PCRD and PCWR respectively as well as an interrupt facility INT.
For dynamical characteristics, see "Power Controller Interface Timing", page 277.
For an example for programming code, see "Example for Programming Power Controller
Interface", page 235.
4.10.1
Communication with the data port (PCD0 ... 2, PCA0,1, PCRD and PCWR) of the power
controller interface is established with local Monitor messages (MON-8) of the IOM
interface. Table 32 lists all MON-8 commands that are relevant to the power controller
interface.
Table 32
Channel
MON-8
MON-8
MON-8
The codes of these commands are given below. For more information about
programming MON-8 commands see "MON-8 Codes", page 228
Access to Power Controller Interface
Data Port
Code
WCI
RCI
ACI
MON-8 and C/I-Commands
Function
MON-command. The address is latched, data is not latched.
Read from interface at specified address. Address is latched
and the current value of the data port is read. The result is
returned to the user with MON-8 "ACI".
data bits at the specified address is returned.
Write to interface. Address and data is contained in the
Answer from interface. After a RCI-request the value of three
196
B
). A software reset with C/I = "RES" does
Operational Description
Data Sheet 01.99
PEB 2091
PEF 2091
®
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