DS21352 datasheet(54/137 Pages) DALLAS

54 / 137 page

DS21352/DS21552

54 of 137

9. DS0 MONITORING FUNCTION

The device has the ability to monitor one DS0 64kbps channel in the transmit direction and one DS0

channel in the receive direction at the same time. In the transmit direction the user will determine which

channel is to be monitored by properly setting the TCM0 to TCM4 bits in the CCR5 register. In the

receive direction, the RCM0 to RCM4 bits in the CCR6 register need to be properly set. The DS0 channel

pointed to by the TCM0 to TCM4 bits will appear in the Transmit DS0 Monitor (TDS0M) register and

the DS0 channel pointed to by the RCM0 to RCM4 bits will appear in the Receive DS0 (RDS0M)

of the appropriate T1 channel. For example, if DS0 channel 6 in the transmit direction and DS0 channel

15 in the receive direction needed to be monitored, then the following values would be programmed into

CCR5 and CCR6:

TCM4 = 0

RCM4 = 0

TCM3 = 0

RCM3 = 1

TCM2 = 1

RCM2 = 1

TCM1 = 0

RCM1 = 1

TCM0 = 1

RCM0 = 0

CCR5: COMMON CONTROL REGISTER 5 (Address=19 Hex)

[repeated here from section 6 for convenience]

(MSB)

(LSB)

TJC

LLB

LIAIS

TCM4

TCM3

TCM2

TCM1

TCM0

SYMBOL

POSITION

NAME AND DESCRIPTION

TJC

CCR5.7

Transmit Japanese CRC6 Enable.

LLB

CCR5.6

Local Loopback.

LIAIS

CCR5.5

Line Interface AIS Generation Enable.

TCM4

CCR5.4

Transmit Channel Monitor Bit 4. MSB of a channel decode that determines which

transmit channel data will appear in the TDS0M register. See Section 0 for details.

TCM3

CCR5.3

Transmit Channel Monitor Bit 3.

TCM2

CCR5.2

Transmit Channel Monitor Bit 2.

TCM1

CCR5.1

Transmit Channel Monitor Bit 1.

TCM0

CCR5.0

Transmit Channel Monitor Bit 0. LSB of the channel decode.

DS21352 Datasheet(PDF) 54 Page - Dallas Semiconductor

DS21352 Datasheet(HTML) 54 Page - Dallas Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL