IDT82V2048 Integrated Device Technology, Inc., IDT82V2048 Datasheet - Page 7

• Manufacturer Part Number: IDT82V2048
• Manufacturer: Integrated Device Technology, Inc.

IDT82V2048 OCTAL T1/E1 SHORT HAUL LINE INTERFACE UNIT
PIN DESCRIPTION (CONTINUED)
MODE2
MODE1
MODE0
CS /JAS
/CODE
Name
VDDIO / 2)
VDDIO / 2)
(Pulled to
(Pulled to
Type
I
I
I
I
QFP144 BGA160
11
43
88
87
Pin No.
H12
J11
E2
K2
MODE2: Control Mode Select 2
The signal on this pin determines which control mode is selected to control the device:
Hardware control pins include MODE[2:0], TS[2:0], LOOP[7:0], CODE, CLKE, JAS and OE.
Serial host Interface pins include CS , SCLK, SDI, SDO and INT .
Parallel host Interface pins include CS , A[4:0], D[7:0], WR / DS , RD /R/ W , ALE/ AS , INT and
RDY/ ACK . The device supports multiple parallel host interface as follows (refer to MODE1 and
MODE0 pin descriptions below for details):
MODE1: Control Mode Select 1
In parallel host mode, the parallel interface operates with separate address bus and data bus
when this pin is Low, and operates with multiplexed address and data bus when this pin is High.
In serial host mode or hardware mode, this pin should be grounded.
MODE0: Control Mode Select 0
In host mode, the parallel host interface is configured for Motorola compatible hosts when this
pin is Low, or for Intel compatible hosts when this pin is High.
CODE: Line Code Rule Select
In hardware control mode, the B8ZS (for T1 mode)/ HDB3 (for E1 mode) encoder/decoder is
enabled when this pin is Low, and AMI encoder/decoder is enabled when this pin is High. The
selections affect all the channels.
In serial host mode, this pin should be grounded.
CS : Chip Select (Active Low)
In host mode, this pin is asserted low by the host to enable host interface. A transition from
High to Low must occur on this pin for each Read/Write operation and the level must not return
to High until the operation is over.
JAS: Jitter Attenuator Select
In hardware control mode, this pin globally determines the Jitter Attenuator position:
Hardware/Host Control Mode
VDDIO/2
JAS
High
Low
MODE[2:0]
VDDIO/2
MODE2
100
101
110
111
High
Low
7
Non-multiplexed Motorola mode interface.
Non-multiplexed Intel mode interface.
Multiplexed Motorola mode interface.
Multiplexed Intel mode interface.
Control by Parallel Host Interface
Control by Serial Host Interface
Description
Control by Hardware mode
Jitter Attenuator (JA) Configuration
Control Interface
Host Interface
INDUSTRIAL TEMPERATURE RANGES
JA in transmit path
JA in receive path
JA not used