DS33R11 Maxim Integrated Products, DS33R11 Datasheet - Page 86
DS33R11
Manufacturer Part Number
DS33R11
Description
Network Controller & Processor ICs Ethernet Mapper with Integrated T1-E1-J1
Manufacturer
Maxim Integrated Products
Datasheet
1.DS33R11.pdf
(344 pages)
Specifications of DS33R11
Product
Framer
Number Of Transceivers
1
Supply Voltage (max)
1.89 V, 3.465 V
Supply Voltage (min)
1.71 V, 3.135 V
Supply Current (max)
100 mA
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Package / Case
BGA
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10.10 Per-Channel Idle Code Generation
Channel data can be replaced by an idle code on a per-channel basis in the transmit and receive directions. When
operated in the T1 mode, only the first 24 channels are used by the device, the remaining channels, CH25–CH32,
are not used.
The device contains a 64-byte idle code array accessed by the idle array address register (TR.IAAR) and the per-
channel idle code register (TR.PCICR). The contents of the array contain the idle codes to be substituted into the
appropriate transmit or receive channels. This substitution can be enabled and disabled on a per-channel basis by
the transmit-channel idle code-enable registers (TR.TCICE1–4) and receive-channel idle code-enable registers
(TR.RCICE1–4).
To program idle codes, first select a channel by writing to the TR.IAAR register. Then write the idle code to the
TR.PCICR register. For successive writes there is no need to load the TR.IAAR with the next consecutive address.
The TR.IAAR register automatically increments after a write to the TR.PCICR register. The auto increment feature
can be used for read operations as well. Bits 6 and 7 of the TR.IAAR register can be used to block write a common
idle code to all transmit or receive positions in the array with a single write to the TR.PCICR register. Bits 6 and 7
of the TR.IAAR register should not be used for read operations. TR.TCICE1–4 and TR.RCICE1–4 are used to
enable idle code replacement on a per-channel basis.
Table 10-10. Idle-Code Array Address Mapping
BITS 0 to 5 OF IAAR
REGISTER
30
31
32
33
34
62
63
—
—
—
—
0
1
2
MAPS TO CHANNEL
Transmit Channel 31
Transmit Channel 32
Receive Channel 31
Receive Channel 32
Transmit Channel 1
Transmit Channel 2
Transmit Channel 3
Receive Channel 1
Receive Channel 2
Receive Channel 3
—
—
—
—
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