r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 805

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

(2)
It is necessary to ensure the PLL oscillation settling time when a power-on reset is initiated by low
level input on the PRESET pin during normal operation.
The timing of reset state indication on the STATUS[1:0] pins is asynchronous. The timing of
indicating normal operation is synchronous with the peripheral clock (Pck), and is therefore
asynchronous with the clocks input from the EXTAL pin and the CLKOUT pin.
Power-On Reset Caused by PRESET Input during Normal Operation
EXTAL
input
CLKOUTENB
output
CLKOUT
output
PRESET
input
STATUS[1:0]
output
Figure 16.4 STATUS Output by Power-On Reset Caused by PRESET Input
LL (normal)
HH (reset)
during Normal Operation
PLL oscillation
settling time
HH (reset)
Rev.1.00 Jan. 10, 2008 Page 775 of 1658
Reset holding time
16. Watchdog Timer and Reset (WDT)
LL (normal)
REJ09B0261-0100