HD64465BP Specifications Changed
1. Change in Specifications
Item changed
Guaranteed value before change
Guaranteed value after change
PLL stabilization time
5ms
Not guaranteed
2. Major Influences Due to Above Change in Specifications
Preconditions
Problems in usage
PLL used in bypass mode
No problem (no standby time added)
Reset signal input after turning power on
No problem (no standby time added)
PLL standby not used although oscillation stop used No problem (no standby time added)
Certain interval allowed between PLL standby and
wakeup
Several seconds may be required for access
by HD64465BP from CPU.
3. Countermeasures
•
Use the system in a state without any problem by referring to "2." above.
•
Create your program in a way to prohibit access other than to the HD64465BP system
configuration register (offset address: H'00000000 to H'00000ff0) for a certain period of time
after returning from PLL standby.
4. Debugged Version
The cause of this problem has already been clarified, which can be solved by correcting the
wiring layer. The new mask product (HD64465EBP) is available as the debugged version.
Содержание HD64465
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