T1022NXE7MQA
| Model | T1022NXE7MQA |
| Description | 32-BIT, 1200MHz, RISC PROCESSOR, PBGA780 |
| PDF file | Total 197 pages (File size: 1M) |
| Chip Manufacturer | PHILIPS |
Electrical characteristics
•
•
•
•
SGMII (1.25 and 3.125 Gbaud)
PEX1/2/3/4 (2.5 and 5Gbps)
Aurora (2.5 and 5 Gbps)
SATA1/2 (1.5 and 3.0 Gbps)
The following sections describe the SerDes reference clock requirements and provide
application information.
3.22.2.1
SerDes spread-spectrum clock source recommendations
SDn_REF_CLKn_P/SDn_REF_CLKn_N are designed to work with spread-spectrum
clock for PCI Express protocol only with the spreading specification defined in
When using spread-spectrum clocking for PCI Express, both ends of the link
partners should use the same reference clock. For best results, a source without
significant unintended modulation must be used.
For SATA protocol, the SerDes transmitter does not support spread-spectrum clocking.
The SerDes receiver does support spread-spectrum clocking on receive, which means the
SerDes receiver can receive data correctly from a SATA serial link partner using spread-
spectrum clocking
The spread-spectrum clocking cannot be used if the same SerDes reference clock is
shared with other non-spread-spectrum supported protocols. For example, if the spread-
spectrum clocking is desired on a SerDes reference clock for PCI Express and the same
reference clock is used for any other protocol such as SATA/SGMII due to the SerDes
lane usage mapping option, spread-spectrum clocking cannot be used at all.
Table 106. SerDes spread-spectrum clock source recommendations
1
Parameter
Frequency modulation
Frequency spread
1. At recommended operating conditions. See
2. Only down-spreading is allowed.
30
+0
Min
33
-0.5
Max
kHz
%
Unit
-
2
Notes
3.22.2.2
SerDes reference clock receiver characteristics
This figure shows a receiver reference diagram of the SerDes reference clocks.
QorIQ T1042, T1022 Data Sheet, Rev. 2, 06/2015
140
Freescale Semiconductor, Inc.
