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CS61884-IQZ

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48P49-P51P52-P54P55-P57P58-P60P61-P63P64-P66P67-P69P70-P72
CS61884
40 DS485F3
14.22 AIS Interrupt Status Register (15h)
14.23 AWG Broadcast Register (16h)
14.24 AWG Phase Address Register (17h)
14.25 AWG Phase Data Register (18h)
14.26 AWG Enable Register (19h)
BIT NAME Description
[7:0] AISI 7-0
Bit n is set to “1” to indicate a change of status of bit n in the AIS Status Register. The bits in
this register indicate which channel changed in status since the last cleared AIS interrupt.
Register bits default to 00h after power-up or reset.
BIT NAME Description
[7:0] AWGB 7-0
Setting bit n to “1” causes the phase data in the AWG Phase Data Register to be written to
the corresponding channel or channels simultaneously. (Refer to Arbitrary Waveform Gen-
erator (See Section 15 on page 43). Register bits default to 00h after power-up or reset.
BIT NAME Description
[7:5] AWGA These bits specify the target channel 0-7. (Refer to Arbitrary Waveform Generator (See
Section 15 on page 43). Register bits default to 00h after power-up or reset.
[4:0] PA[4:0] These bits specify 1 of 24 (E1) or 26/28 (T1/J1) phase sample address locations of the AWG,
that the phase data in the AWG Phase Data Register is written to or read from. The other
locations in each channel’s phase sample addresses are not used, and should not be
accessed. Register bits default to 00h after power-up or reset.
BIT NAME Description
[7] RSVD RESERVED (This bit must be set to 0.)
[6:0] AWGD [6:0]
These bits are used for the pulse shape data that will be written to the AWG phase location
specified by the AWG Phase Address Register. The value written to or read from this register
will be written to or read from the AWG phase sample location specified by the AWG Phase
Address register. A software reset through the Software Reset Register does not effect the
contents of this register. The data in each phase is a 7-bit 2’s complement number (the max-
imum positive value is 3Fh and the maximum negative value is 40h). (Refer to Arbitrary
Waveform Generator (See Section 15 on page 43). Register bits default to 00h after
power-up.
BIT NAME Description
[7:0] AWGN 7-0
The AWG enable register is used for selecting the source of the customized transmission
pulse-shape. Setting bit n to “1” in this register selects the AWG as the source of the output
pulse shape for channel n. When bit n is set to “0” the pre-programmed pulse shape in the
ROM is selected for transmission on channel n. (Refer to Arbitrary Waveform Generator
(See Section 15 on page 43). Register bits default to 00h after power-up or reset.
CS61884
DS485F3 41
14.27 AWG Overflow Interrupt Enable Register (1Ah)
14.28 AWG Overflow Interrupt Status Register (1Bh)
14.29 Reserved Register (1Ch)
14.30 Reserved Register (1Dh)
14.31 Bits Clock Enable Register (1Eh)
14.32 Reserved Register (1Fh)
BIT NAME Description
[7:0] AWGE 7-0
This register enables changes in the overflow status to be reflected in the AWG Interrupt Sta-
tus register, thus causing as interrupt on the INT
pin. Interrupts are maskable on a per-chan-
nel basis. Register bits default to 00h after power-up or reset.
BIT NAME Description
[7:0] AWGI 7-0
The bits in this register indicate a change in status since the last AWG overflow interrupt. An
AWG overflow occurs when invalid phase data are entered, such that a sample-by-sample
addition of UI0 and UI1 results in values that exceed the arithmetic range of the 7-bit repre-
sentation. Reading this register clears the interrupt, which deactivates the INT
pin. Register
bits default to 00h after power-up or reset.
BIT NAME Description
[7:0] RSVD 7-0 RESERVED (These bits must be set to zero.)
BIT NAME Description
[7:0] RSVD 7-0 RESERVED (These bits must be set to zero.)
BIT NAME Description
[7:0] BITS 7-0 Setting a “1” to bit n in this register changes channel n to a stand-alone timing recovery unit
used for G.703 clock recovery. (Refer to BUILDING INTEGRATED TIMING SYSTEMS
(BITS) CLOCK MODE (See Section 8 on page 23) for a better description of the G.703 clock
recovery function). Register bits default to 00h after power-up or reset.
BIT NAME Description
[7:0] RSVD 7-0 RESERVED (These bits must be set to zero.)
CS61884
42 DS485F3
14.33 Status Registers
The following Status registers are read-only: LOS
Status Register (04h) (See Section 14.5 on
page 35), DFM Status Register (05h) (See Sec-
tion 14.6 on page 35) and AIS Status Register
(13h) (See Section 14.20 on page 39). The
CS61884 generates an interrupt on the INT pin any
time an unmasked status register bit changes.
14.33.1 Interrupt Enable Registers
The Interrupt Enable registers: LOS Interrupt En-
able Register (06h) (See Section 14.7 on page 36),
DFM Interrupt Enable Register (07h) (See Sec-
tion 14.8 on page 36), AIS Interrupt Enable Reg-
ister (14h) (See Section 14.21 on page 39) and
AWG Overflow Interrupt Enable Register
(1Ah) (See Section 14.27 on page 41), enable
changes in status register state to cause an interrupt
on the INT pin. Interrupts are maskable on a per
channel basis. When an Interrupt Enable register
bit is 0, the corresponding Status register bit is dis-
abled from causing an interrupt on the INT pin.
NOTE: Disabling an interrupt has no effect on the sta-
tus reflected in the associated status register.
14.33.2 Interrupt Status Registers
The following interrupt status registers: LOS In-
terrupt Status Register (08h) (See Section 14.9
on page 36), DFM Interrupt Status Register
(09h) (See Section 14.10 on page 36), AIS Inter-
rupt Status Register (15h) (See Section 14.22 on
page 40) and AWG Overflow Interrupt Status
Register (1Bh) (See Section 14.28 on page 41), in-
dicate a change in status of the corresponding status
registers in host mode. Reading these registers
clears the interrupt, which deactivates the INT pin.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P39P40-P42P43-P45P46-P48P49-P51P52-P54P55-P57P58-P60P61-P63P64-P66P67-P69P70-P72

CS61884-IQZ

Mfr. #:
Buy CS61884-IQZ
Manufacturer:
Cirrus Logic
Description:
Telecom Interface ICs IC Octal T1/E1/J1 Line Interface Unit
Lifecycle:
New from this manufacturer.
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