mpc8378e Freescale Semiconductor, Inc, mpc8378e Datasheet - Page 58

• Manufacturer Part Number: mpc8378e
• Description: Powerquicc Ii Pro Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

JTAG
11.3.2.1
The following equations show how to calculate the allowed combined propagation delay range of the
SD_CLK and SD_DAT/CMD signals on the PCB.
This means that Data + Clock delay can be up to 11 ns for a 20 ns clock cycle:
11.3.2.2
The following equations show how to calculate the allowed combined propagation delay range of the
SD_CLK and SD_DAT/CMD signals on the PCB.
This means that Data + Clock delay must be greater than ~6 ns for a 20 ns clock cycle:
11.3.2.3
The following equation is the combined formula to calculate the propagation delay range of the SD_CLK
and SD_DAT/CMD signals on the PCB.
12 JTAG
This section describes the DC and AC electrical specifications for the IEEE 1149.1 (JTAG) interface of
the MPC8378E.
58
0.5 × t
t
t
10
6 < t
CLK_DELAY
CLK_DELAY
–
SHSCK
2.5 + (-1.5) < t
CLK_DELAY
High-Speed Read Meeting Setup (Maximum Delay)
High-Speed Read Meeting Hold (Minimum Delay)
High-Speed Read Combined Formula
0.5 × t
0.5 × t
–
t
MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 3
+ t
+ t
SHSCK
OH
t
SHSCK
t
CLK_DELAY
CLK_DELAY
DATA_DELAY
DATA_DELAY
+ t
+ t
SHSIXKH
< t
CLK_DELAY
–
DATA_DELAY
t
OH
CLK_DELAY
+ t
+ t
+ t
< t
DATA_DELAY
DATA_DELAY
SHSIXKH
< 30
< 11
CLK_DELAY
+ t
+ t
–
DATA_DELAY
DATA_DELAY
–
14
t
INT_CLK_DLY
+ t
< 1.5 × t
–
+ t
5
ODLY
DATA_DELAY
+ t
SHSCK
+ t
SHSIVKH
OH
< t
–
CLK_DELAY
–
t
< 1.5 × t
t
SHSIXKH
ODLY
< 1.5 × t
–
SHSCK
t
SHSIVKH
+ t
+ t
SHSCK
INT_CLK_DLY
DATA_DELAY
–
t
ODLY
–
t
Freescale Semiconductor
SHSIVKH
Eqn. 15
Eqn. 16
Eqn. 17
Eqn. 18
Eqn. 19