S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
Pin Name Type
TPRTY Input
Pin
No.
D20
Function
The Transmit Parity (TPRTY) signal provides the parity
(programmable for odd or even parity) of the TDAT[15:0] bus. The
TPRTY signal is considered valid only when valid data is
transferring as indicated by the TENB signal asserted low. When
this interface is operating in 8-bit mode, this signal provides the
parity of TDAT[7:0].
A parity error is indicated by a status bit and a maskable interrupt.
The TPRTY input signal is sampled on the rising edge of TCLK.
9.5 Microprocessor Interface (31 Signals)
Pin Name Type
Pin
Function
No.
The Micro Data (D[15:0]) signals provide a data bus to allow the
S/UNI-IMA-4 device to interface to an external microprocessor. Both
read and write transactions are supported. The microprocessor
interface is used to configure and monitor the S/UNI-IMA-4 device.
D[15]
D[14]
D[13]
D[12]
D[11]
D[10]
D[9]
I/O
B18
B17
D18
C16
A17
B16
C15
D17
A16
B15
A15
B14
A14
D14
C13
B13
D[8]
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
The Micro Address (A[10:1]) signals provide an address bus to
allow the S/UNI-IMA-4 device to interface to an external
microprocessor.
A[10]
A[9]
A[8]
A[7]
A[6]
A[5]
A[4]
A[3]
A[2]
A[1]
Input
A13
D13
C12
B12
D12
A11
B11
D10
A10
B10
The A[10:1] indicate a word address. The S/UNI-IMA-4
microprocessor interface is not byte addressable.
The A[10:1] input signals are sampled while the ALE is asserted
high.
The Address Latch Enable (ALE) is an active high signal that
latches the A[10:1] signals during the address phase of a bus
transaction. When ALE is set high, the address latches are
transparent. When ALE is set low, the address latches hold the
address provided on A[10:1].
ALE
Input
Input
C10
The ALE input has an internal pull-up resistor.
The Write Strobe Bar (WRB) is an active low signal that qualifies
write accesses to the S/UNI-IMA-4 device. When the CSB is set low,
the D[15:0] bus contents are clocked into the addressed register on
the rising edge of WRB.
WRB
D9
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
35
PMC [ PMC-SIERRA, INC ]
