PRELIMINARY
PM4318 OCTLIU
DATASHEET
PMC- 2001578
ISSUE 3
OCTAL E1/T1/J1 LINE INTERFACE DEVICE
Reg[13:0]
3FFE
Action
Pause for Data[7:0] x 4096 XCLK periods before reading next PROM
command.
3FFF
Stop, i.e. configuration of OCTLIU has finished.
The ‘ignore subsequent register write commands’ command can be used to configure multiple
OCTLIU’s in a cascade individually (for example, to allocate different SBI tributaries to different
OCTLIU devices). It provides a means to progressively ‘switch off’ each device in the cascade
once it has been configured. Consider for example the following sequence of configuration
commands:
Command
(hex)
Explanation
C00102
Write 02 to register 01 of all devices in the cascade, regardless of SRCODE.
:
:
(Subsequent configuration commands are acted upon by all devices in the
cascade.)
3FFD00
First device in cascade ignores all further register writes.
C00103
:
Write 03 to register 01 of all devices in the cascade except the first,
regardless of SRCODE.
:
:
(Subsequent configuration commands are acted upon by all devices in the
cascade except the first.)
3FFD00
Second device in cascade ignores all further register writes.
C00104
:
Write 04 to register 01 of all devices in the cascade except the first two,
regardless of SRCODE.
:
:
(Subsequent configuration commands are acted upon by all devices in the
cascade except the first and second.)
The pause command can be used, for example, to allow the clock synthesis circuitry within the
CSD block time to stablise before configuring the rest of the device.
9.19 JTAG Test Access Port
The JTAG Test Access Port block provides JTAG support for boundary scan. The standard JTAG
EXTEST, SAMPLE, BYPASS, IDCODE and STCTEST instructions are supported.
9.20 Microprocessor Interface
The Microprocessor Interface Block provides normal and test mode registers, the interrupt logic,
and the logic required to connect to the Microprocessor Interface. The normal mode registers are
required for normal operation, and test mode registers are used to enhance the testability of the
OCTLIU.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
48
PMC [ PMC-SIERRA, INC ]
