MT90222AG Zarlink Semiconductor, MT90222AG Datasheet - Page 7

• Manufacturer Part Number: MT90222AG
• Description: Description = 4 Port Ima & TC PHY For T1, E1 And DSL ;; Package Type = N/a ;; No. Of Pins =
• Manufacturer: Zarlink Semiconductor

MT90222 Pin Description
H3,H4,G1,G2,G
1,P3,P1,N1,N2,
T1,R3,R4,R2,R
B7,A7,D8,C8,
U2,U1,T4,T2,
F3,E1,E3,D1,
D2,C1,D3,C2
B8,D9,C9,B9
3,G4,F1,F2,
Y4,W3,W4,
N3,M2,M4
W2,W1
L1, L2,
L4, L3,
Pin #
U3
H2
V1
V4
V3
V2
K3
K2
K1
J4
J3
UTxSOC
URxData
URxSOC
URxAddr
UTxData
UTxAddr
URxClav
UTxClav
UTxEnb
URxEnb
URxPar
UTxPar
URxClk
UTxClk
Name
[15:0]
[15:0]
[4:0]
[4:0]
sr_d
[7:0]
I/O
I/O
O
O
O
O
O
I
I
I
I
I
I
ATM Output Port Signals (UTOPIA Receive Interface)
I
I
I
ATM Input Port Signals (UTOPIA Transmit Interface)
UTOPIA Transmit Data Bus. 16 (or 8) bit wide data driven from ATM LAYER device
to MT90222. Bit 15 (or 7) is the MSB. All arriving data between the last word (byte) of
the previous cell and the first word (byte) of the following cell (indicated by the SOC
signal) is ignored. UTxData[15:8] have internal weak pull-downs.
UTOPIA Transmit Parity. Odd (or Even) Parity bit generated by the ATM LAYER. The
parity bit is sampled on the rising edge of UTxClk. UTxPar has an internal weak
pull-down.
UTOPIA Transmit Start of Cell Signal. Active HIGH signal asserted by the ATM
LAYER device when TxData[15:0] ([7:0]) contains the first valid word (byte) of the cell.
After this signal is high, the following 26 word (52 bytes) should contain valid data. The
MT90222 waits for another TxSOC and TxEnb signal after reading a complete cell.
UTOPIA Transmit Clock. Transfer clock from the ATM Layer device to the MT90222
which synchronizes data transfers on TxData[15:0] ([7:0]). This signal is the clock of
the incoming data. Data is sampled on the rising edge of this signal.
UTOPIA Transmit Data Enable. Active LOW signal asserted by the ATM LAYER
device during cycles when TxData contains valid cell data.
UTOPIA Transmit Cell Available Signal. For cell-level flow control in a MPHY
environment, TxClav is an active high tri-stateable signal from the MT90222 to the
ATM LAYER device.
Transmit Address.Five bit wide address bus driven by the ATM layer device to poll
and select the appropriate PHY address. TxAddr[4] is the MSB.
UTOPIA Receive Data Bus. 16 (or 8) bit wide data driven from MT90222 to ATM
layer device. RxData[15] ([7]) is the MSB. To support multiple PHY configurations,
RxData is driven only when RxEnb and port is selected. It is tri-stated otherwise.
UTOPIA Receive Parity. Odd (or Even) Parity bit generated by the MT90222 to the
ATM Layer.
UTOPIA Receive Start of Cell Signal. Active high asserted by the MT90222 when
RxData contains the first valid word (byte) of a cell.
UTOPIA Receive Clock. This signal is the clock driven from the ATM layer to the PHY
layer. Data changes after the rising edge of this signal.
UTOPIA Receive Data Enable. Active LOW signal asserted by the ATM layer device
to indicate that URxData[15:0] ([7:0]) and URxSOC will be sampled at the end of the
next cycle. In multiple PHY configurations, URxEnb is used to tri-state URxData and
URxSOC MT90222 outputs. In this case, URxData and URxSOC would be enabled
only in cycles following those with URxEnb asserted. In UTOPIA L1, URxEnb must not
be tied low and must transition from high (disabled) to low (enabled) to indicate the
beginning of data transfer.
UTOPIA Receive Cell Available Signal. For cell-level flow control in a MPHY
environment, URxClav is an active high tri-stateable signal from the MT90222 to ATM
LAYER device.
Receive Address. Five bit wide address bus driven from the ATM to PHY device to
select the appropriate PHY address. URxAddr[4] is the MSB.
Static Memory Data Bus. Data Bus to exchange data between the MT90222 and the
external static memory. sr_d[7:0] has internal weak pull-downs.
Receiver Static Memory Interface Signals
Zarlink Semiconductor Inc.
MT90222/3/4
7
Description
Data Sheet