m21262 Mindspeed Technologies, m21262 Datasheet - Page 11

• Manufacturer Part Number: m21262
• Description: Cdr/reclocker With 4 1 Input Multiplexer
• Manufacturer: Mindspeed Technologies

The M21262 supports multiple high-speed output modes. The output modes are selectable with hardwired pins
only. The I/O interface is set with Out_Mode [1:0] and the output level with MF [9:8] as shown in
serial interface mode, the Out_ctrl_N [7:6] register is used to set the data level, and Out_Mode [1:0] is used to set
the interface type. In the serial interface mode, the data output can be enabled with Out_ctrl_N [2] = 1b (default)
and the output data polarity can be flipped by setting Out_ctrl_N [3] = 1b (default: no inversion). Output data
polarity flip is an internal function that would have the same effect as switching the P and N terminals. The
recommended AVdd_I/O for the different output interfaces is shown in
modes for PECL and InfiniBand are provided for lower power dissipation, when desired.
Table 1-1.
Table 1-2.
1.1.5
Table 1-3
The M21262 allows the user to route any of the four inputs to the output channel. The selector can be configured
through the control register or through the hardwired pins Select_Mode[1:0].
Table 1-3.
21262-DSH-001-C
Multifunction Pins & Register
Out_ctrl_N [7:6]
details the selector configuration for each setting for the hardwired pins Select_Mode[1:0].
MF [9:8]
PCML+ at 1500 mV
PCML at 1200 mV
00b
01b
10b
11b
PCML at 550 mV
PCML at 900 mV
Output Interface and Level Mapping (For both hardwired and software modes)
Output Interface and Recommended AVdd_I/O Range
Selector Configuration Settings
Output Logic
Mode 0
LVDS GPL
LVDS RRL
Selector Settings
0
0
1
1
Off
Out_Mode [1:0] = 00b
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PCML Mode
1200 mV
550 mV
900 mV
Off
AVdd_I/O Range (V)
Mode 1
0
1
0
1
1.8–3.3
1.8–3.3
1.8–3.3
1.8–3.3
1.8–3.3
1.8–3.3
1.8–3.3
Out_Mode [1:0] = 01b
RRL at 450 mV
GPL at 650 mV
LVDS Mode
®
1000 mV
Table
Off
1-2. The nonstandard lower swing
Functional Description
Out_Mode [1:0] = 11b
Output
input 0
input 1
input 2
input 3
PCML+ Mode
Table
1200 mV
1500 mV
900 mV
Off
1-1. In the
3