DS3181 Maxim Integrated Products, DS3181 Datasheet - Page 122

• Manufacturer Part Number: DS3181
• Description: Network Controller & Processor ICs DS3-E3 ATM-Packet PH Y with Built-in Line
• Manufacturer: Maxim Integrated Products

Specifications of DS3181

• Product: Framer
• Number Of Transceivers: 1
• Data Rate: 44.736 Mbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Supply Current (max): 280 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Package / Case: TEBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10.5.8 Fractional Payload Controller
The Fractional Payload Controller allows the user flexibility to control sub-rate datastreams. The Fractional Payload
Controller performs fractional overhead/payload data multiplexing. Fractional overhead is sourced from either an
internal register or the external interface. The allocation of the DS3/E3 payload is also controlled either internally
(internally controlled mode) or through the external interface (externally controlled mode).
The third option is Flexible Mode that allows the user to externally multiplex payload and overhead, bypassing the
Fractional Payload Controller.
10.5.9 PLCP/Fractional port pins
The PLCP/Fractional port pins are have multiple functions based on the framing mode the device is in as well as
other pin mode select bits.
10.5.9.1 Transmit PLCP/Fractional port pins
The transmit PLCP/Fractional pins are TSOFIn / TOHMIn, TPOHn / TFOHn / TSERn, TPOHENn / TFOHENIn /
TPDENIn, TPOHSOFn / TSOFOn / TDENn / TFOHENOn, TPDENOn, TPDATn, and TPOHCLKn / TCLKOn /
TGCLKn. They have different functions based on the framing mode and other pin mode bits. Unused input pin
functions should drive a logic zero into the device circuits expecting a signal from that pin. The control bits that
configure
PORT.CR3.TCLKS.
Table 10-20
multiplexed pins.
Table 10-20. TSOFIn/TOHMIn Input Pin Functions
0XXX00 (FRM)
0XXX1X (FRM)
0XXX01 (OHM)
1XX0X1 (OHM)
1XX0X0 (UFRM)
1XX1XX (UFRM)
Table 10-21. TSERn/TPOHn/TFOHn Input Pin Functions
0XX00X (FRM)
0XX010 (IFRAC)
0XX010 (IFRAC)
0XX011 (XFRAC)
0XX10X (PLCP)
0XX10X (PLCP)
0XX110 (FFRAC)
1XX0XX (CLR)
FM[5:0]
PORT.CR2
FM[5:0]
PORT.CR2
the
to
Table 10-26
pins’
TSOFIn
TSOFIn
TOHMIn
TOHMIn
Not used
Not used
PORT.CR3
modes
FUNCTION
TPFPE
X
X
X
X
0
1
0
1
PIN
describe the function selected by the FM bits and other pin mode bits for the
are
Not used
Not used
TFOHn
TFOHn
Not used
TPOHn
TSERn
Not used
FUNCTION
PORT.CR2.FM[5:0],
PIN
122
PORT.CR3.TPFPE,
PORT.CR3.TSOFOS
and