MT9074
Advance Information
Pin Description
Pin #
Name
Description
68Pin 100 Pin
PLCC MQFP
17
18
19
90
91
92
Vss
IC
Negative Power Supply (Input). Digital ground.
Internal Connection. Tie to Vss (ground) for normal operation.
INT/MOT Intel/Motorola Mode Selection (Input).A high on this pin configures the
processor interface for the Intel parallel non-multiplexed bus type. A low configures
the processor interface for the Motorola parallel non-multiplexed type.
20
93
VDD
Positive Power Supply (Input). Digital supply (+5V± 5%).
21 -
24
94-97
D4 - D7
Data 4 to Data 7 (Three-state I/O). These signals combined with D0-D3 form the
bidirectional data bus of the parallel processor interface (D7 is the most significant
bit).
25
98
R/W/WR Read/Write/Write Strobe (Input). In Motorola mode (R/W), this input controls the
direction of the data bus D[0:7] during a microprocessor access. When R/W is
high, the parallel processor is reading data from the MT9074. When low, the
parallel processor is writing data to the MT9074. For Intel mode (WR), this active
low write strobe configures the data bus lines as output.
26 - 99, 8-11 AC0 - AC4 Address/Control 0 to 4 (Inputs). Address and control inputs for the non-
30
multiplexed parallel processor interface. AC0 is the least significant input.
31
12
GND
Receive Analog Ground (Input). Analog ground for the LIU receiver.
ARx
32
33
13
14
RTIP
RRING
Receive TIP and RING (Input). Differential inputs for the receive line signal - must
be transformer coupled (See Figure 5). In digital framer mode these are TTL level
inputs that connect to the digital outputs of a receiver. If the receiver serial data
output is NRZ connect that output to RTIP. If the receiver data output is split phase
unipolar signal connect one signal to RTIP and the complementary signal to
RRING.
34
15
VDD
Receive Analog Power Supply (Input). Analog supply for the LIU receiver (+5V ±
ARx
5%).
35
36
37
16
17
18
VDD
Positive Power Supply (Input). Digital supply (+5V ± 5%).
Negative Power Supply (Input). Digital ground.
VSS
TxA
Transmit A (Output). When the internal LIU is disabled (digital framer only
mode), if control bit NRZ=1, and NRZ output data is clocked out on pin TxA with
the rising edge of C1.50 (TxB has no function when NRZ format is selected). If
NRZ=0, pins TxA and TxB are a complementary pair of signals that output digital
dual-rail clocked out with the rising edge of C1.50.
38
39
19
20
TxB
Transmit B (Output). When the internal LIU is disabled and control bit NRZ=0,
pins TxA and TxB are a complementary pair of signals that output digital dual-rail
data clocked out with the rising edge of C1.50.
RxDLCLK Data Link Clock (Output). A gapped clock signal derived from the extracted clock
from the line clock, available for an external device to clock in RxDL data (at 4, 8,
12, 16 or 20 kHz) on the rising edge.
40
41
21
22
RxDL
Receive Data Link (Output). A serial bit stream containing received line data after
zero code suppression. This data is clocked out with the rising edge of E1.5o.
TxMF
Transmit Multiframe Boundary (Input). An active low input used to set the
transmit multiframe boundary (CAS or CRC multiframe). The MT9074 will generate
its own multiframe if this pin is held high. This input is usually pulled high for most
applications.
4
MITEL [ MITEL NETWORKS CORPORATION ]
