CMX625D5 CML Microcircuits, CMX625D5 Datasheet - Page 4

• Manufacturer Part Number: CMX625D5
• Description: ISDN TA POTS Interface
• Manufacturer: CML Microcircuits

ISDN TA POTS Interface
1.3
2000 Consumer Microcircuits Limited
CMX625
Pin No.
D5/P4
Signal List
10
11
1
2
3
4
5
6
7
8
9
TE/NTE
RESET
Name
IRQN
FSC
DCL
SA0
SA1
SA2
DD
DU
DS
Signal
Type
O/P
I/P
I/P
I/P
I/P
I/P
I/P
I/P
I/P
BI
BI
The IOM-2 Frame Synchronisation Clock. This is an 8kHz
clock indicating the start of the frame. FSC is generated
by the upstream device. See section 1.5.1, 1.5.2 and
1.5.3.
The IOM-2 Data Clock. It is used to clock data on and off
the bus and operates at 1.536MHz for Terminal mode
(TE) or 4.096MHz for non-Terminal mode (non-TE or Line
Card mode). DCL is generated by the upstream device.
When the bus is deactivated, DCL is held in a low state.
See section 1.5.1, 1.5.2 and 1.5.3.
The IOM-2 Data Downstream, receives data from the
network. When the bus is deactivated or when data is not
being transmitted, DD is high impedance.
Channel Bus Reversal (TE mode only) allows IC1 and
IC2 data to be transmitted on the DD pin. See section
1.5.1, 1.5.2, 1.5.3 and 1.5.6. An external pull-up resistor
is required.
The IOM-2 Data Upstream,
network. When the bus is deactivated or when data is not
being transmitted, DU is high impedance.
Channel Bus Reversal (TE mode only) allows IC1 and
IC2 data to be received on the DU pin. See section 1.5.1,
1.5.2, 1.5.3 and 1.5.6.
required.
The IOM-2 two modes of operation:
Terminal mode. NTE = 1 selects Non-Terminal mode or
Line Card mode. See section 1.5.1, 1.5.2 and 1.5.3.
) The IOM-2 Slot Address, provides one of 8 unique
) addresses. It allows the device to be individually
) addressed when more than one device is connected
) to the IOM-2 bus. See section 1.5.2 and 1.5.3.
The IOM-2 Device Select pin (NTE mode only). Allows
two CMX625 devices sharing a Slot Address to be
individually addressed. DS = 0 selects device one. DS =
1 selects device two. See section 1.5.2 and 1.5.3.
The external reset pin clears all the registers. (RESET=1)
A ‘wire-Orable’ output Interrupt Request. This output is
pulled down to V
when inactive. An external pull-up resistor is required.
4
SS
when active and is high impedance
Description
An external pull-up resistor is
transmits data to the
TE = 0 selects
The IC
The IC
CMX625
D/625/1