ds2143qn-t-r Maxim Integrated Products, Inc., ds2143qn-t-r Datasheet - Page 30

• Manufacturer Part Number: ds2143qn-t-r
• Description: Ds2143, Ds2143q E1 Controller
• Manufacturer: Maxim Integrated Products, Inc.

TNAF: TRANSMIT NON-ALIGN FRAME REGISTER (Address=21 Hex)
12.0 LINE INTERFACE CONTROL FUNCTION
The DS2143 can control line interface units that contain serial ports. When Control Register Bytes 1 or 2
(CRB1, CRB2) are written to, the DS2143 will automatically write this data serially (LSB first) into the
line interface by creating a chip select, serial clock and serial data via the LI_
pins respectively. This control function is driven off of the RCLK and it must be present for proper
operation. Registers CRB1 and CRB2 can only be written to, they cannot be read from. Writes to these
registers must be at least 20 s apart. See Section 13 for timing information.
CRB1: CONTROL REGISTER BYTE 1 (Address=18 Hex)
CRB2: CONTROL REGISTER BYTE 2 (Address=19 Hex)
(MSB)
(MSB)
CR7
CR7
Si
SYMBOL
SYMBOL
CR1
CR7
Sa4
Sa5
Sa6
Sa7
Sa8
Si
A
1
CR6
CR6
1
POSITION
POSITION
TNAF.7
TNAF.6
TNAF.5
TNAF.4
TNAF.3
TNAF.2
TNAF.1
TNAF.0
CR5
CR5
CRB1.0
CRB2.7
A
CR4
CR4
LSB of Control Register Byte 1.
MSB of Control Register Byte 2.
NAME AND DESCRIPTION
International Bit.
Frame Non-Alignment Signal Bit.
Remote Alarm.
Additional Bit 4.
Additional Bit 5.
Additional Bit 6.
Additional Bit 7.
Additional Bit 8.
NAME AND DESCRIPTION
Sa4
CR3
CR3
30 of 44
Sa5
CR2
CR2
Sa6
CR1
CR1
CS
, LI_SCLK and LI_SDI
CR0
CR0
(LSB)
Sa7
DS2143/DS2143Q
CRB1
CRB2
(LSB)
Sa8