MSC8157ETVT1000A Freescale Semiconductor, MSC8157ETVT1000A Datasheet - Page 87

• 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

3.6.3
Table 49
Figure 21
3.6.4
This section describes the AC electrical characteristics for the Ethernet interface.
There are three general configuration registers used to configure the timing: GCR4, UCC1_DELAY_HR, and
UCC3_DELAY_HR. These registers configure the programmable delay units (PDU) that should be programmed differently for
each Interface to meet timing requirements. For additional information, see the MSC8157 Reference Manual.
3.6.4.1
Freescale Semiconductor
At recommended operating conditions (see
Timers inputs—minimum pulse width
Notes:
GE_MDC frequency
GE_MDC period
GE_MDC clock pulse width high
GE_MDC clock pulse width low
GE_MDC to GE_MDIO delay
GE_MDIO to GE_MDC rising edge setup time
GE_MDC rising edge to GE_MDIO hold time
lists the timer input AC timing specifications.
1.
2.
shows the AC test load for the timers
The maximum allowed frequency of timer outputs is 125 MHz. Configure the timer modules appropriately.
Timer inputs and outputs are asynchronous to any visible clock. Timer outputs should be synchronized before use by any
external synchronous logic. Timer inputs are required to be valid for at least t
Timers and Timers_32b AC Timing Specifications
Ethernet Timing
Management Interface Timing
Output
Table 50. Ethernet Controller Management Interface Timing
Characteristics
MSC8157 Six-Core Digital Signal Processor Data Sheet, Rev. 1
Characteristics
Table 49. Timers Input AC Timing Specifications
Table
4).
Figure 21. Timer AC Test Load
Z
0
= 50 Ω
R
L
t
t
t
= 50 Ω
Symbol
MDKHDX
MDDVKH
MDDXKH
t
t
MDC_H
MDC_L
f
t
MDC
MDC
Symbol
TIWID
T
TIWID
ns to ensure proper operation.
V
DDIO
Min
400
160
160
Minimum
/2
10
20
—
0
Electrical Characteristics
8
Max
2.5
70
—
—
—
—
—
Unit
ns
Unit
MHz
Notes
ns
ns
ns
ns
ns
ns
1, 2
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