CX28344 Conexant, CX28344 Datasheet - Page 19

• Manufacturer Part Number: CX28344
• Description: (CX2834x) Dual / Triple / Quad / Hex / Octal - Enhanced DS3 / E3 Framer
• Manufacturer: Conexant

CX28342/3/4/6/8 Data Sheet
Table 1-4. Transmitter Section System Side (1 of 2)
28348-DSH-001-B
TXDATI1
TXDATI2
TXDATI3
TXDATI4
TXSY1
TXSY2
TXSY3
TXSY4
TXCKI1
TXCKI2
TXCKI3
TXCKI4
TXGAPCK1
TXGAPCK2
TXGAPCK3
TXGAPCK4
Pin Label
CX28342 Pin # CX28343 Pin #
132
130
131
133
40
—
—
38
—
—
39
—
—
44
—
—
132
118
130
115
131
117
133
121
38
40
—
—
39
—
44
—
Mindspeed Technologies™
CX28344 Pin #
132
118
130
115
131
117
133
121
40
57
38
55
39
56
44
58
Framers 1
Transmit Serial
Data Input
Framers 2
Transmit Serial
Data Input
Framers 3
Transmit Serial
Data Input
Framers 4
Transmit Serial
Data Input
Framers 1
Transmit Sync
Framers 2
Transmit Sync
Framers 3
Transmit Sync
Framers 4
Transmit Sync
Framers 1
Transmit Clock
In
Framers 2
Transmit Clock
In
Framers 3
Transmit Clock
In
Framers 4
Transmit Clock
In
Framers 1
Transmit
Gapped Clock
Framers 2
Transmit
Gapped Clock
Framers 3
Transmit
Gapped Clock
Framers 4
Transmit
Gapped Clock
Signal Name
IOZPD
IOZPD
IOZPD
IOZPD
IPD
IPD
IPD
IPD
O/Z
O/Z
O/Z
O/Z
I/O
I
I
I
I
TXDATI is serial data input to
framer transmitter. The serial
data is sampled on the falling
edge of TXCKI input clock.
Framer transmit frame
synchronization indicator. The
sync signal can be
programmed to be generated
internally (the pin used as
output) or supplied from
external circuit (the pin used
as input). After reset, it has a
high-Z value.
Used to clock in serial data
TXDATI in serial mode. The
sync and data inputs are
sampled on the falling edge.
DS3 Mode Clock = 44.736
MHz E3-G.751/G.832 Mode
Clock = 34.368 MHz
A gapped clock is derived
from the falling edge of TXCKI
clock. It is gapped during
Overhead bits that are not
selected to be inserted with
payload on TXDATI. Its
polarity is programmable.
Definition
Product Description
1
-
9