DS33R11 Maxim Integrated Products, DS33R11 Datasheet - Page 95
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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10.16.2
The FIFO control register (TR.HxFC) controls and sets the watermarks for the transmit and receive FIFOs. Bits 3,
4, and 5 set the transmit low watermark and the lower 3 bits set the receive high watermark.
When the transmit FIFO empties below the low watermark, the TLWM bit in the appropriate HDLC status register
TR.SR6 or TR.SR7 is set. TLWM is a real-time bit and remains set as long as the transmit FIFO’s read pointer is
below the watermark. If enabled, this condition can also cause an interrupt through the INT pin.
When the receive FIFO fills above the high watermark, the RHWM bit in the appropriate HDLC status register is
set. RHWM is a real-time bit and remains set as long as the receive FIFO’s write pointer is above the watermark. If
enabled, this condition can also cause an interrupt through the INT pin.
10.16.3 HDLC Mapping
The HDLC controllers must be assigned a space in the T1/E1 bandwidth in which they transmit and receive data.
The controllers can be mapped to either the FDL (T1), Sa bits (E1), or to channels. If mapped to channels, then
any channel or combination of channels, contiguous or not, can be assigned to an HDLC controller. When
assigned to a channel(s), any combination of bits within the channel(s) can be avoided.
The TR.HxRCS1 – TR.HxRCS4 registers are used to assign the receive controllers to channels 1–24 (T1) or
1–32 (E1) according to the following table:
The TR.HxTCS1 – TR.HxTCS4 registers are used to assign the transmit controllers to channels 1–24 (T1) or
1–32 (E1) according to the following table.
TR.HxRCS1
TR.HxRCS2
TR.HxRCS3
TR.HxRCS4
TR.HxTCS1
TR.HxTCS2
TR.HxTCS3
TR.HxTCS4
REGISTER
REGISTER
FIFO Control
CHANNELS
CHANNELS
17–24
25–32
17–24
25–32
9–16
9–16
1–8
1–8
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