DJLXT380LE.B4 Cortina Systems Inc, DJLXT380LE.B4 Datasheet - Page 40

• Manufacturer Part Number: DJLXT380LE.B4
• Manufacturer: Cortina Systems Inc

Specifications of DJLXT380LE.B4

• Lead Free Status / RoHS Status: Not Compliant

LXT380 — Octal E1 G.703 Transceiver
4.4
4.4.1
40
Table 22. Boundary Scan Register, BSR
JTAG Register Description
The following paragraphs describe each of the registers represented in
Boundary Scan Register, BSR
The BSR is a shift register that provides access to all the digital I/O pins. The BSR is used to apply
and read test patterns to/from the board. Each pin is associated with a scan cell in the BSR register.
Bidirectional pins or tristatable pins require more than one position in the register.
the BSR scan cells and their functions. Data into the BSR is shifted in LSB first.
Bit #
10
12
13
14
15
16
17
18
19
20
21
22
23
11
0
1
2
3
4
5
6
7
8
9
RNEG1
LOOP0
LOOP0
LOOP1
LOOP1
LOOP2
LOOP2
LOOP3
LOOP3
LOOP4
LOOP4
LOOP5
LOOP5
LOOP6
LOOP6
LOOP7
LOOP7
TNEG1
RPOS1
TPOS1
RCLK1
TCLK1
Signal
N/A
N/A
Pin
I/O Type
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
-
-
I
I
I
Symbol
PDOEN
TNEG1
RPOS1
RNEG1
PADD0
TPOS1
RCLK1
TCLK1
PADI1
PADI2
PADI3
PADI4
PADI5
PADI6
PADI7
HIZB1
PDO0
PDO1
PDO2
PDO3
PDO4
PDO5
PDO6
PDO7
Bit
PDOEN controls the LOOP0 through LOOP7 pins.
Setting PDOEN to “1” configures the pins as outputs. The
output value to the pin is set in PDO[0..7].
Setting PDOEN to “0” tristates all the pins. The input value to
the pins can be read in PADD[0.7].
HIZB1 controls the RPOS1, RNEG1 and RCLK1 pins. Setting
HIZB1 to “1” enables output on the pins. Setting HIZB1 to “0”
tristates the pins.
Comments
Figure 14 on page
Table 22
Datasheet
37.
shows