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Register Configuration for DS26504
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Keywords: E1, T1, unframed, CRC4, ESF, D4, BITS
Related Parts

APPLICATION NOTE 6542

Register Configuration for DS26504


Abstract: This application note describes the basic register settings to configure the DS26504 for operation in various modes. The device supports three modes each for E1 and T1 operation—for E1, the DS26504 supports unframed mode, as well as CRC4 and FAS framing structure modes; for T1, the device supports unframed mode, as well as D4 and ESF framing structure modes. The DS26504 can also be configured to operate with the G.703 and 6312kHz synchronization interfaces, as well as the 64kHz composite clock interface.

Introduction

The DS26504 is a building-integrated timing supply (BITS) clock-recovery element that also functions as a reduced function set single-chip transceiver. The receiver portion of this device can recover a clock from E1 and T1, the G.703 and 6312kHz synchronization interfaces, and the 64kHz composite clock interface. This application note describes how to configure DS26504 registers for operating in each these modes.

Table 1. Acronym Definitions
AcronymDescription
CRC Cyclic Redundancy Check
ESF Extended Super Frame
FAS Frame Alignment Signal
SF Superframe

Operating Modes

Configuring the MCREG register allows the user to set the DS26504 to operate in the following modes:

  • E1 Modes
    • Unframed
    • CRC4 Framing Structure
    • FAS Framing Structure
  • T1 Modes
    • Unframed
    • D4 Framing Structure
    • ESF Framing Structure
  • G.703 2.048MHz Synchronous Interface Mode
  • 6312kHz Synchronization Interface Mode
  • 64kHz Composite Clock Mode

E1 Mode

The DS26504 supports unframed and framed E1 modes. This section provides detailed register settings for E1 unframed mode as well as those for the CRC4 and FAS framing structures.

Table 2. Register Settings for E1 Mode—Unframed
Register Address Register Name Value
0x8010 IDR 0x22
0x8000 TSTRREG 0x00
0x8008 MCREG 0x66
0x8009 TPCR1 0x48
0x800A TPCR2 0x00
0x8007 T1CCR 0x00
0x8003 T1RCR1 0x00
0x8004 T1RCR2 0x00
0x8005 T1TCR1 0x00
0x8006 T1TCR2 0x40
0x801D E1RCR 0x20
0x801E E1TCR 0x02
0x8001 IOCR1 0x80
0x8002 IOCR2 0x00
0x8020 LBCR 0x00
0x801F BOCC 0x00
0x8050 RFDL 0x00
0x8051 TFDL 0x1C
0x8052 RFDLM1 0x00
0x8053 RFDLM2 0x00
0x8011 INFO1 0x00
0x8012 INFO2 0x00
0x801C INFO3 0x00
0x8013 IIR 0x00
0x8014 SR1 0x12
0x8015 IMR1 0x00
0x8016 SR2 0x3A
0x8017 IMR2 0x00
0x8018 SR3 0x00
0x8019 IMR3 0x00
0x801A SR4 0x3F
0x801B IMR4 0x00
0x8021 SR5 0x1F
0x8022 IMR5 0x00
0x8030 LIC1 0x11
0x8031 LIC2 0x08
0x8032 LIC3 0x00
0x8033 LIC4 0x00
0x8034 TLBC 0x00
0x8056 RAF 0x9B
0x8057 RNAF 0xC0
0x8040 TAF 0x1B
0x8041 TNAF 0x40
0x8058 RSiAF 0x4B
0x8059 RSiNAF 0x2F
0x805A RRA 0x00
0x805B RSa4 0x00
0x805C RSa5 0x00
0x805D RSa6 0x00
0x805E RSa7 0x00
0x805F RSa8 0x00
0x8042 TSiAF 0x00
0x8043 TSiNAF 0x00
0x8044 TRA 0x00
0x8045 TSa4 0x00
0x8046 TSa5 0x00
0x8047 TSa6 0x00
0x8048 TSa7 0x00
0x8049 TSa8 0x00
0x804A TSACR 0x00

Table 3. Register Settings for E1 Mode—CRC4 Framing Structure
Register Address Register Name Value
0x8010 IDR 0x22
0x8000 TSTRREG 0x00
0x8008 MCREG 0x66
0x8009 TPCR1 0x48
0x800A TPCR2 0x00
0x8007 T1CCR 0x00
0x8003 T1RCR1 0x00
0x8004 T1RCR2 0x00
0x8005 T1TCR1 0x00
0x8006 T1TCR2 0x40
0x801D E1RCR 0x20
0x801E E1TCR 0x02
0x8001 IOCR1 0x80
0x8002 IOCR2 0x00
0x8020 LBCR 0x00
0x801F BOCC 0x00
0x8050 RFDL 0x00
0x8051 TFDL 0x1C
0x8052 RFDLM1 0x00
0x8053 RFDLM2 0x00
0x8011 INFO1 0x00
0x8012 INFO2 0x00
0x801C INFO3 0x04
0x8013 IIR 0x00
0x8014 SR1 0x00
0x8015 IMR1 0x00
0x8016 SR2 0x09
0x8017 IMR2 0x00
0x8018 SR3 0x44
0x8019 IMR3 0x00
0x801A SR4 0x00
0x801B IMR4 0x00
0x8021 SR5 0x00
0x8022 IMR5 0x00
0x8030 LIC1 0x01
0x8031 LIC2 0x18
0x8032 LIC3 0x00
0x8033 LIC4 0x00
0x8034 TLBC 0x00
0x8056 RAF 0xFF
0x8057 RNAF 0xFF
0x8040 TAF 0x1B
0x8041 TNAF 0x40
0x8058 RSiAF 0x00
0x8059 RSiNAF 0x00
0x805A RRA 0x00
0x805B RSa4 0x00
0x805C RSa5 0x00
0x805D RSa6 0x00
0x805E RSa7 0x00
0x805F RSa8 0x00
0x8042 TSiAF 0x00
0x8043 TSiNAF 0x00
0x8044 TRA 0x00
0x8045 TSa4 0x00
0x8046 TSa5 0x00
0x8047 TSa6 0x00
0x8048 TSa7 0x00
0x8049 TSa8 0x00
0x804A TSACR 0x00

Table 4. Register Settings for E1 Mode—FAS Framing Structure
Register Address Register Name Value
0x8010 IDR 0x22
0x8000 TSTRREG 0x00
0x8008 MCREG 0x44
0x8009 TPCR1 0x48
0x800A TPCR2 0x00
0x8007 T1CCR 0x00
0x8003 T1RCR1 0x00
0x8004 T1RCR2 0x00
0x8005 T1TCR1 0x00
0x8006 T1TCR2 0x40
0x801D E1RCR 0x20
0x801E E1TCR 0x02
0x8001 IOCR1 0x80
0x8002 IOCR2 0x00
0x8020 LBCR 0x00
0x801F BOCC 0x00
0x8050 RFDL 0x00
0x8051 TFDL 0x1C
0x8052 RFDLM1 0x00
0x8053 RFDLM2 0x00
0x8011 INFO1 0x00
0x8012 INFO2 0x00
0x801C INFO3 0x04
0x8013 IIR 0x00
0x8014 SR1 0x00
0x8015 IMR1 0x00
0x8016 SR2 0x09
0x8017 IMR2 0x00
0x8018 SR3 0x44
0x8019 IMR3 0x00
0x801A SR4 0x00
0x801B IMR4 0x00
0x8021 SR5 0x00
0x8022 IMR5 0x00
0x8030 LIC1 0x01
0x8031 LIC2 0x18
0x8032 LIC3 0x00
0x8033 LIC4 0x00
0x8034 TLBC 0x00
0x8056 RAF 0xFF
0x8057 RNAF 0xff
0x8040 TAF 0x1B
0x8041 TNAF 0x40
0x8058 RSiAF 0x00
0x8059 RSiNAF 0x00
0x805A RRA 0x00
0x805B RSa4 0x00
0x805C RSa5 0x00
0x805D RSa6 0x00
0x805E RSa7 0x00
0x805F RSa8 0x00
0x8042 TSiAF 0x00
0x8043 TSiNAF 0x00
0x8044 TRA 0x00
0x8045 TSa4 0x00
0x8046 TSa5 0x00
0x8047 TSa6 0x00
0x8048 TSa7 0x00
0x8049 TSa8 0x00
0x804A TSACR 0x00

T1 Mode

The DS26504 supports unframed and framed T1 modes. This section provides detailed register settings for T1 unframed mode as well as those for the D4 and ESF framing structures.

Table 5. Register Settings for T1 Mode—Unframed
Register Address Register Name Value
0x8010 IDR 0x22
0x8000 TSTRREG 0x00
0x8008 MCREG 0x11
0x8009 TPCR1 0x00
0x800A TPCR2 0x00
0x8007 T1CCR 0x00
0x8003 T1RCR1 0x00
0x8004 T1RCR2 0x00
0x8005 T1TCR1 0x00
0x8006 T1TCR2 0x00
0x801D E1RCR 0x00
0x801E E1TCR 0x00
0x8001 IOCR1 0x00
0x8002 IOCR2 0x00
0x8020 LBCR 0x00
0x801F BOCC 0x00
0x8050 RFDL 0x00
0x8051 TFDL 0x1C
0x8052 RFDLM1 0x00
0x8053 RFDLM2 0x00
0x8011 INFO1 0x0F
0x8012 INFO2 0x00
0x801C INFO3 0x04
0x8013 IIR 0x00
0x8014 SR1 0x06
0x8015 IMR1 0x00
0x8016 SR2 0x03
0x8017 IMR2 0x00
0x8018 SR3 0x0C
0x8019 IMR3 0x00
0x801A SR4 0x14
0x801B IMR4 0x00
0x8021 SR5 0x00
0x8022 IMR5 0x00
0x8030 LIC1 0x03
0x8031 LIC2 0x00
0x8032 LIC3 0x00
0x8033 LIC4 0x00
0x8034 TLBC 0x00
0x8056 RAF 0x00
0x8057 RNAF 0x00
0x8040 TAF 0x1B
0x8041 TNAF 0x40
0x8058 RSiAF 0x00
0x8059 RSiNAF 0x00
0x805A RRA 0x00
0x805B RSa4 0x00
0x805C RSa5 0x00
0x805D RSa6 0x00
0x805E RSa7 0x00
0x805F RSa8 0x00
0x8042 TSiAF 0x00
0x8043 TSiNAF 0x00
0x8044 TRA 0x00
0x8045 TSa4 0x00
0x8046 TSa5 0x00
0x8047 TSa6 0x00
0x8048 TSa7 0x00
0x8049 TSa8 0x00
0x804A TSACR 0x00

Table 6. Register Settings for T1 Mode—Unframed
Register Address Register Name Value
0x8010 IDR 0x22
0x8000 TSTRREG 0x00
0x8008 MCREG 0x00
0x8009 TPCR1 0x00
0x800A TPCR2 0x00
0x8007 T1CCR 0x00
0x8003 T1RCR1 0x00
0x8004 T1RCR2 0x20
0x8005 T1TCR1 0x00
0x8006 T1TCR2 0xC0
0x801D E1RCR 0x00
0x801E E1TCR 0x00
0x8001 IOCR1 0x00
0x8002 IOCR2 0x00
0x8020 LBCR 0x00
0x801F BOCC 0x00
0x8050 RFDL 0xE3
0x8051 TFDL 0x1C
0x8052 RFDLM1 0x00
0x8053 RFDLM2 0x00
0x8011 INFO1 0x00
0x8012 INFO2 0x00
0x801C INFO3 0x04
0x8013 IIR 0x00
0x8014 SR1 0x00
0x8015 IMR1 0x00
0x8016 SR2 0x00
0x8017 IMR2 0x00
0x8018 SR3 0x0C
0x8019 IMR3 0x00
0x801A SR4 0x14
0x801B IMR4 0x00
0x8021 SR5 0x00
0x8022 IMR5 0x00
0x8030 LIC1 0x01
0x8031 LIC2 0x10
0x8032 LIC3 0x00
0x8033 LIC4 0x00
0x8034 TLBC 0x00
0x8056 RAF 0x00
0x8057 RNAF 0x00
0x8040 TAF 0x1B
0x8041 TNAF 0x40
0x8058 RSiAF 0x00
0x8059 RSiNAF 0x00
0x805A RRA 0x00
0x805B RSa4 0x00
0x805C RSa5 0x00
0x805D RSa6 0x00
0x805E RSa7 0x00
0x805F RSa8 0x00
0x8042 TSiAF 0x00
0x8043 TSiNAF 0x00
0x8044 TRA 0x00
0x8045 TSa4 0x00
0x8046 TSa5 0x00
0x8047 TSa6 0x00
0x8048 TSa7 0x00
0x8049 TSa8 0x00
0x804A TSACR 0x00

Table 7. Register Settings for T1 Mode—ESF Framing Structure
Register Address Register Name Value
0x8010 IDR 0x22
0x8000 TSTRREG 0x00
0x8008 MCREG 0x11
0x8009 TPCR1 0x00
0x800A TPCR2 0x00
0x8007 T1CCR 0x00
0x8003 T1RCR1 0x00
0x8004 T1RCR2 0x00
0x8005 T1TCR1 0x00
0x8006 T1TCR2 0x00
0x801D E1RCR 0x00
0x801E E1TCR 0x00
0x8001 IOCR1 0x00
0x8002 IOCR2 0x00
0x8020 LBCR 0x00
0x801F BOCC 0x00
0x8050 RFDL 0x00
0x8051 TFDL 0x1C
0x8052 RFDLM1 0x00
0x8053 RFDLM2 0x00
0x8011 INFO1 0x0F
0x8012 INFO2 0x00
0x801C INFO3 0x04
0x8013 IIR 0x00
0x8014 SR1 0x06
0x8015 IMR1 0x00
0x8016 SR2 0x8B
0x8017 IMR2 0x00
0x8018 SR3 0x0E
0x8019 IMR3 0x00
0x801A SR4 0x1D
0x801B IMR4 0x00
0x8021 SR5 0x00
0x8022 IMR5 0x00
0x8030 LIC1 0x01
0x8031 LIC2 0x10
0x8032 LIC3 0x00
0x8033 LIC4 0x00
0x8034 TLBC 0x00
0x8056 RAF 0x00
0x8057 RNAF 0x00
0x8040 TAF 0x1B
0x8041 TNAF 0x40
0x8058 RSiAF 0x00
0x8059 RSiNAF 0x00
0x805A RRA 0x00
0x805B RSa4 0x00
0x805C RSa5 0x00
0x805D RSa6 0x00
0x805E RSa7 0x00
0x805F RSa8 0x00
0x8042 TSiAF 0x00
0x8043 TSiNAF 0x00
0x8044 TRA 0x00
0x8045 TSa4 0x00
0x8046 TSa5 0x00
0x8047 TSa6 0x00
0x8048 TSa7 0x00
0x8049 TSa8 0x00
0x804A TSACR 0x00

G.703 Synchronous Interface Mode

Table 8. Register Settings for G.703 2.048MHz Synchronization Interface Mode
Register Address Register Name Value
0x8010 IDR 0x22
0x8000 TSTRREG 0x00
0x8008 MCREG 0x88
0x8009 TPCR1 0x48
0x800A TPCR2 0x00
0x8007 T1CCR 0x00
0x8003 T1RCR1 0x00
0x8004 T1RCR2 0x00
0x8005 T1TCR1 0x00
0x8006 T1TCR2 0x40
0x801D E1RCR 0x20
0x801E E1TCR 0x02
0x8001 IOCR1 0x80
0x8002 IOCR2 0x00
0x8020 LBCR 0x00
0x801F BOCC 0x00
0x8050 RFDL 0xFF
0x8051 TFDL 0x1c
0x8052 RFDLM1 0x00
0x8053 RFDLM2 0x00
0x8011 INFO1 0x02
0x8012 INFO2 0x00
0x801C INFO3 0x04
0x8013 IIR 0x00
0x8014 SR1 0x02
0x8015 IMR1 0x00
0x8016 SR2 0x05
0x8017 IMR2 0x00
0x8018 SR3 0x1C
0x8019 IMR3 0x00
0x801A SR4 0x1F
0x801B IMR4 0x00
0x8021 SR5 0x00
0x8022 IMR5 0x00
0x8030 LIC1 0x01
0x8031 LIC2 0x18
0x8032 LIC3 0x00
0x8033 LIC4 0x00
0x8034 TLBC 0x00
0x8056 RAF 0xFF
0x8057 RNAF 0xFF
0x8040 TAF 0x1B
0x8041 TNAF 0x40
0x8058 RSiAF 0xFF
0x8059 RSiNAF 0xFF
0x805A RRA 0xFF
0x805B RSa4 0xFF
0x805C RSa5 0xFF
0x805D RSa6 0xFF
0x805E RSa7 0xFF
0x805F RSa8 0xFF
0x8042 TSiAF 0x00
0x8043 TSiNAF 0x00
0x8044 TRA 0x00
0x8045 TSa4 0x00
0x8046 TSa5 0x00
0x8047 TSa6 0x00
0x8048 TSa7 0x00
0x8049 TSa8 0x00
0x804A TSACR 0x00

6312kHz Synchronization Interface Mode

Table 9. Register Settings for 6312kHz Synchronization Interface Mode
Register Address Register Name Value
0x8010 IDR 0x22
0x8000 TSTRREG 0x00
0x8008 MCREG 0xBB
0x8009 TPCR1 0xF8
0x800A TPCR2 0x00
0x8007 T1CCR 0x00
0x8003 T1RCR1 0x00
0x8004 T1RCR2 0x00
0x8005 T1TCR1 0x00
0x8006 T1TCR2 0x40
0x801D E1RCR 0x00
0x801E E1TCR 0x00
0x8001 IOCR1 0x00
0x8002 IOCR2 0x00
0x8020 LBCR 0x00
0x801F BOCC 0x00
0x8050 RFDL 0x00
0x8051 TFDL 0x1C
0x8052 RFDLM1 0x00
0x8053 RFDLM2 0x00
0x8011 INFO1 0x0F
0x8012 INFO2 0x00
0x801C INFO3 0x04
0x8013 IIR 0x00
0x8014 SR1 0x06
0x8015 IMR1 0x00
0x8016 SR2 0x0b
0x8017 IMR2 0x00
0x8018 SR3 0x0E
0x8019 IMR3 0x00
0x801A SR4 0x1F
0x801B IMR4 0x00
0x8021 SR5 0x00
0x8022 IMR5 0x00
0x8030 LIC1 0x03
0x8031 LIC2 0x10
0x8032 LIC3 0x00
0x8033 LIC4 0x00
0x8034 TLBC 0x00
0x8056 RAF 0x00
0x8057 RNAF 0x00
0x8040 TAF 0x1B
0x8041 TNAF 0x40
0x8058 RSiAF 0x00
0x8059 RSiNAF 0x00
0x805A RRA 0x00
0x805B RSa4 0x00
0x805C RSa5 0x00
0x805D RSa6 0x00
0x805E RSa7 0x00
0x805F RSa8 0x00
0x8042 TSiAF 0x00
0x8043 TSiNAF 0x00
0x8044 TRA 0x00
0x8045 TSa4 0x00
0x8046 TSa5 0x00
0x8047 TSa6 0x00
0x8048 TSa7 0x00
0x8049 TSa8 0x00
0x804A TSACR 0x00

64kHz Composite Clock Mode

Table 10. Register Settings for 64kHz Composite Clock
Register Address Register Name Value
0x8010 IDR 0x22
0x8000 TSTRREG 0x00
0x8008 MCREG 0x99
0x8009 TPCR1 0x90
0x800A TPCR2 0x00
0x8007 T1CCR 0x00
0x8003 T1RCR1 0x00
0x8004 T1RCR2 0x00
0x8005 T1TCR1 0x00
0x8006 T1TCR2 0x40
0x801D E1RCR 0x20
0x801E E1TCR 0x02
0x8001 IOCR1 0x80
0x8002 IOCR2 0x00
0x8020 LBCR 0x00
0x801F BOCC 0x00
0x8050 RFDL 0x00
0x8051 TFDL 0x1C
0x8052 RFDLM1 0x00
0x8053 RFDLM2 0x00
0x8011 INFO1 0x0F
0x8012 INFO2 0x00
0x801C INFO3 0x04
0x8013 IIR 0x00
0x8014 SR1 0x06
0x8015 IMR1 0x00
0x8016 SR2 0x08
0x8017 IMR2 0x00
0x8018 SR3 0x0C
0x8019 IMR3 0x00
0x801A SR4 0x07
0x801B IMR4 0x00
0x8021 SR5 0x00
0x8022 IMR5 0x00
0x8030 LIC1 0x01
0x8031 LIC2 0x18
0x8032 LIC3 0x00
0x8033 LIC4 0x00
0x8034 TLBC 0x00
0x8056 RAF 0x00
0x8057 RNAF 0x00
0x8040 TAF 0x1B
0x8041 TNAF 0x40
0x8058 RSiAF 0x00
0x8059 RSiNAF 0x00
0x805A RRA 0x00
0x805B RSa4 0x00
0x805C RSa5 0x00
0x805D RSa6 0x00
0x805E RSa7 0x00
0x805F RSa8 0x00
0x8042 TSiAF 0x00
0x8043 TSiNAF 0x00
0x8044 TRA 0x00
0x8045 TSa4 0x00
0x8046 TSa5 0x00
0x8047 TSa6 0x00
0x8048 TSa7 0x00
0x8049 TSa8 0x00
0x804A TSACR 0x00
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APP 6542:
APPLICATION NOTE 6542,AN6542, AN 6542, APP6542, Appnote6542, Appnote 6542