DS26334 Просмотр технического описания (PDF) - Maxim Integrated

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производитель

DS26334

3.3V, 16-Channel, E1/T1/J1 Short- and Long-Haul Line Interface Unit

Maxim Integrated 

NAME

RCLK1

RCLK2

RCLK3

RCLK4

RCLK5

RCLK6

RCLK7

RCLK8

RCLK9

RCLK10

RCLK11

RCLK12

RCLK13

RCLK14

RCLK15

RCLK16

MCLK

LOS1

LOS2

LOS3

LOS4

LOS5

LOS6

LOS7

LOS8

LOS9

LOS10

LOS11

LOS12

LOS13

LOS14

LOS15/TECLK

LOS16/CLKA

MODESEL

MOTEL

CSB

DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit

PIN TYPE

FUNCTION

D3

G6

K3

K5

P5

M8

P10

Receive Clock for Channels 1–16. The receive data (RPOS/RNEG)

P13

L13

O,

tri-state

is clocked out on the rising edge of RCLK. If a given receiver is in

power-down mode the RCLK is high impedance. Upon an LOS being

detected, the RCLK is switched from the recovered clock to MCLK.

K14

RCLK can be inverted by the RCLKI register.

G13

F12

E8

E9

F8

E6

Master Clock. This is an independent free-running clock that can be

a multiple of 2.048MHz ±50ppm for E1 mode or 1.544MHz ±50ppm

H12

I

for T1 mode. The clock selection is available by MC bits MPS0,

MPS1, FREQS, and PLLE. A multiple of 2.048MHz can be internal

adapted to 1.544MHz and a multiple of 1.544MHz can be internal

adapted to 2.048MHz.

D2

G2

J2

Loss-of-Signal Output. This output goes high when there is no

M2

transition on the received signal over a specified interval. The output

R2

will go low when there is sufficient ones density in the received signal.

T2

R4

The LOS criteria for assertion and desertion criteria are described in

Section 5.5.6. The LOS outputs can be configured to comply with

T1.231, ITU-T G.775, or ETS 300 233.

R7

R14

O

T1/E1 Clock (TECLK) (Ball E11 only). This output becomes a T1 or

N15

E1 programmable clock output when enabled by register MC. For T1

K15

or E1 frequency selection, see the CCR register.

H15

Clock A (CLKA) (Ball F10 only). This output becomes a

B10

programmable clock output when enabled by register MC. For

B8

frequency options, see the CCR register.

E11

F10

HOST SELECTION

Mode Selection. This pin is used to select the control mode of the

A3

I

DS26334:

Low → Serial Host Mode

High → Parallel Host Mode

B3

I

Motorola Intel Select. When this pin is low, Motorola mode is

selected. When this pin is high Intel mode is selected.

P14

I

Chip Select Bar. This signal must be low during all accesses to the

registers.

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