參數資料
型號: LXT386
廠商: Intel Corp.
英文描述: QUAD T1/E1/J1 Transceiver
中文描述: 四T1/E1/J1收發(fā)器
文件頁數: 48/78頁
文件大?。?/td> 500K
代理商: LXT386
LXT386
QUAD T1/E1/J1 Transceiver
48
Datasheet
5.4.1
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.
Table 1
shows
the BSR scan cells and their functions. Data into the BSR is shifted in LSB first.
Example 1. Boundary Scan Register (BSR)
Bit #
Pin
Signal
I/O
Type
Bit
Symbol
Comments
0
LOS3
O
LOS3
RNEG3
O
RNEG3
N/A
-
HIZ3
HIZ3 controls the RPOS3, RNEG3 and RCLK3 pins. Setting HIZ3 to
0
enables output on the pins. Setting HIZ3 to
1
tristates the pins.
RPOS3
O
RPOS3
RCLK3
O
RCLK3
TNEG3
I
TNEG3
TPOS3
I
TPOS3
TCLK3
I
TCLK3
LOS2
O
LOS2
RNEG2
O
RNEG2
N/A
-
HIZ2
HIZ2 controls the RPOS2, RNEG2 and RCLK2 pins. Setting HIZ2 to
0
enables output on the pins. Setting HIZ2 to
1
tristates the pins.
RPOS2
O
RPOS2
RCLK2
O
RCLK2
TNEG2
I
TNEG2
TPOS2
I
TPOS2
TCLK2
I
TCLK2
MCLK
I
MCLK
MODE
I
MODE
INT
O
INTRUPTB
N/A
-
SDORDYENB
SDORDYENB controls the ACK pin. Setting SDORDYENB to
0
enables
output on ACK pin. Setting SDORDYENB to
1
tristates the pin.
ACK
O
SDORDY
ALE
I
ALE
OE
I
OE
CLKE
I
CLKE
A0
I
A0
A1
I
A1
A2
I
A2
A3
I
A3
A4
I
A4
LOOP0
I/O
PADD0
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