Reset Factors And Oscillation Stabilization Wait Time - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 4 RESET
4.2

Reset Factors and Oscillation Stabilization Wait Time

The four types of reset factors can occur in the MB90470-series devices. The
oscillation stabilization wait time during a reset varies depending on the reset factor.
I Reset factors and oscillation stabilization wait time
Table 4.2-1 "Reset factors and oscillation stabilization wait time" summarizes the reset factors
and the oscillation stabilization wait time.
Table 4.2-1 Reset factors and oscillation stabilization wait time
Reset factors
Power-on reset
Watchdog timer
External reset via pin RST
Software reset
HCLK: Oscillation clock
WS1, WS0: Bits for selecting oscillation stabilization wait time of clock selection register (CKSCR)
Figure 4.2-1 "Waiting times to stable oscillation for evaluation devices/FLASH devices and mask
devices during power-on reset" shows the oscillation stabilization wait time for evaluation
devices, FLASH devices, and mask devices during a power-on reset.
104
Oscillation stabilization wait time
The value in parentheses ( ) is a period when oscillation clock is 4 MHz
Evaluation devices/FLASH devices: 2
17
Mask devices: 2 /HCLK (about 32.77 ms)
None: Bits WS1 and WS0 are initialized to "11".
None: Bits WS1 and WS0 are initialized to "11".
None: Bits WS1 and WS0 are initialized to "11".
18
/HCLK (about 65.54 ms).