IDT82V2048 Integrated Device Technology, Inc., IDT82V2048 Datasheet - Page 24

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

IDT82V2048 OCTAL T1/E1 SHORT HAUL LINE INTERFACE UNIT
Serial Host Interface
host Mode. In this mode, the registers are accessible through a 16-bit
word which contains an 8-bit command/address byte (bit R/W and 5-
address-bit A1~A5, A6 and A7 are ignored) and a subsequent 8-bit
data byte (D0~D7). When bit R/W is 1, data is read out at pin SDO.
When bit R/W is 0, data is written into pin SDI to the register which is
indicated by address bits A5~A1.
INTERRUPT HANDLING
Interrupt Sources
The analog/digital loss of signal detector continuously monitors the re-
ceived signal to update the specific bit in LOS which indicates presence
or absence of a LOS condition.
automatic power driver circuit continuously monitors the output drivers
signal to update the specific bit in DFM which indicates presence or ab-
sence of a secondary driver short circuit condition.
Register(13H). The AIS detector monitors the received signal to up-
date the specific bit in AIS which indicates presence or absence of a
AIS condition.
Status Register, (expanded 0BH). The IBLC detector monitors the
inband loopback activation or deactivation code in received signal to
update the specific bit in e-LBS which indicates presence or absence
of an inband loopback condition.
TABLE - 12. PARALLEL HOST INTERFACE PINS
NOTE:
1. While R/W=1, read from IDT82V2048; While R/W=0, write to IDT82V2048.
2. Ignored.
MODE[2:0]
By pulling pin MODE2 to VDDIO/2, the device operates in the serial
There are four kinds of interrupt sources:
1. Status change in the LOS (Loss of Signal) Status Register(04H).
2. Status change in the DF (Driver Fault) Status Register(05H). The
3. Status change in the AIS (Alarm Indication Signal) Status
4. Status change in the e-LBS (Inband Loopback Code Receive)
100
101
110
111
SCLK
SDO
SDI
CS
Non-multiplexed Motorola interface
Non-multiplexed Intel interface
Multiplexed Motorola interface
Multiplexed Intel interface
Host interface
R/W
1
A1
Address/Command Byte
High Impedance
A2
Figure - 18. Serial Host Mode Timing
A3
A4 A5 A6
24
2
A7
2
D0 D1 D2 D3 D4 D5 D6 D7
D0 D1 D2 D3 D4 D5 D6 D7
CS, ACK, DS, R/W, AS, AD[7:0], INT
CS, ACK, DS, R/W, AS, A[4:0], D[7:0], INT
CS, RDY, WR, RD, ALE, AD[7:0], INT
CS, RDY, WR, RD, ALE, A[4:0], D[7:0], INT
Driven while R/W=1
Generic control, data, and output pin name
Input Data Byte
No
Figure - 19. Interrupt Service Routine
Read Interrupt Status Register
Read Corresponding Status
INDUSTRIAL TEMPERATURE RANGES
Service the Interrupt
Interrupt Allowed
Interrupt Condition
Register
Exist?
Yes