MSC8157ETVT1000A Freescale Semiconductor, MSC8157ETVT1000A Datasheet - Page 56

• Manufacturer Part Number: MSC8157ETVT1000A
• Description: Digital Signal Processors & Controllers - DSP, DSC Qual 8157 EN FG 1GHz -45 to 105c
• Manufacturer: Freescale Semiconductor

Specifications of MSC8157ETVT1000A

• Rohs: yes
• Core: SC3850
• Data Bus Width: 32 bit
• Program Memory Size: 32 KB
• Data Ram Size: 512 KB
• Number Of Programmable I/os: 32
• Number Of Timers: 2
• Operating Supply Voltage: 0.97 V to 1.05 V
• Maximum Operating Temperature: + 105 C
• Package / Case: FCPBGA-783
• Mounting Style: SMD/SMT

Electrical Characteristics
transmitter (Tx) and receiver (Rx) reference circuits. The data lane circuit specifications are specific for each supported
interface, and they have individual subsections by protocol. The selection of individual data channel functionality is done via
the Reset Configuration Word High Register (RCWHR) SerDes Protocol selection fields (S1P and S2P). Specific AC electrical
characteristics are defined in
3.5.2.1
The SerDes interface uses differential signaling to transfer data across the serial link. This section defines terms used in the
description and specification of differential signals.
either a transmitter output (SD_[A–J]_TX and SD_[A–J]_TX) or a receiver input (SD_[A–J]_RX and SD_[A–J]_RX). Each
signal swings between X volts and Y volts where X > Y.
Using this waveform, the definitions are listed in
transmitter and receiver operate in a fully symmetrical differential signaling environment.
56
Single-Ended Swing
Differential Output Voltage, VOD (or
Differential Output Swing)
Differential Input Voltage, VID (or
Differential Input Swing)
X Volts
Y Volts
Term
Signal Term Definitions
Figure 2. Differential Voltage Definitions for Transmitter/Receiver
SD_[A–J]_TX or
SD_[A–J]_RX
SD_[A–J]_TX or
SD_[A–J]_RX
Section 3.6.2, “HSSI AC Timing
MSC8157 Six-Core Digital Signal Processor Data Sheet, Rev. 1
The transmitter output signals and the receiver input signals SD[A–J]_TX, SD_[A–J]_TX,
SD_[A–J]_RX and SD_[A–J]_RX each have a peak-to-peak swing of X – Y volts. This is
also referred to as each signal wire’s single-ended swing.
The differential output voltage (or swing) of the transmitter, V
of the two complimentary output voltages: V
be either positive or negative.
The differential input voltage (or swing) of the receiver, V
the two complimentary input voltages: V
either positive or negative.
Table 10. Differential Signal Definitions
Differential Peak-Peak Voltage, V
Table
Differential Swing, V
Differential Peak Voltage, V
Figure 2
10. To simplify the illustration, the definitions assume that the SerDes
shows how the signals are defined in addition to the waveform for
Specifications.”
ID
or V
DIFFpp
Definition
SD_[A–J]_RX
OD
DIFFp
= 2 × V
SD_[A–J]_TX
= X – Y
= |X – Y|
DIFFp
– V
SD_[A–J]_RX.
– V
ID
(not shown)
, is defined as the difference of
SD[A–J]_TX.
OD
, is defined as the difference
Freescale Semiconductor
V
cm
The V
= (X + Y)/2
The V
ID
value can be
OD
value can