82P2821BH IDT, Integrated Device Technology Inc, 82P2821BH Datasheet - Page 136

• Manufacturer Part Number: 82P2821BH
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82P2821BH

• Number Of Transceivers: 1
• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Not Compliant

8.13 MICROPROCESSOR INTERFACE TIMING
8.13.1 SERIAL MICROPROCESSOR INTERFACE
and a rising transition indicates the end of the operation. After CS is set
to low, a 5-bit instruction on SDI is input to the device on the rising edge
of SCLK. If the MSB is ‘1’, it is a read operation. If the MSB is ‘0’, it is a
Physical And Electrical Specifications
IDT82P2821
SCLK
SDO
SDI
SCLK
CS
SDO
A falling transition on CS indicates the start of a read/write operation,
SDI
CS
R/W
R/W
0
0
1
Instruction
1
Instruction
Don't Care
Don't Care
2
2
Figure-59 Write Operation in Serial Microprocessor Interface
Figure-58 Read Operation in Serial Microprocessor Interface
3
3
4
4
A10
A10 A9
5
5
High-Z
A9
High-Z
6
6
A8
A8
7
7
A7 A6 A5 A4 A3 A2 A1
A7 A6 A5 A4 A3 A2 A1
8
8
Register Address
Register Address
9
9
10
10
21(+1) CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
136
11
11
write operation. Following the instruction, an 11-bit address is clocked in
on SDI to specify the register. If the device is in a read operation, the
data read from the specified register is output on SDO on the falling
edge of SCLK (refer to Figure-58). If the device is in a write operation,
the data written to the specified register is input on SDI following the
address byte (refer to Figure-59).
12
12
13
13
14
14
A0
A0
15
15
D7 D6 D5 D4 D3 D2 D1
D7 D6 D5 D4 D3 D2 D1
16
16
17
17
18
18
Don't-Care
Data Byte
19
19
20
20
21
21
February 6, 2009
22
22
D0
D0
23
23