HD64F3437TFI16V Renesas Electronics America, HD64F3437TFI16V Datasheet - Page 583

• Manufacturer Part Number: HD64F3437TFI16V
• Description: MCU FLASH 60K 100-TQFP
• Manufacturer: Renesas Electronics America

Specifications of HD64F3437TFI16V

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

22.4
22.4.1
Regardless of its current state, the chip enters hardware standby mode whenever the STBY pin
goes low.
Hardware standby mode reduces power consumption drastically by halting the CPU, stopping all
the functions of the on-chip supporting modules, and placing I/O ports in the high-impedance
state. The registers of the on-chip supporting modules are reset to their initial values. Only the on-
chip RAM is held unchanged, provided the minimum necessary voltage supply is maintained.
Notes: 1. The RAME bit in the system control register should be cleared to 0 before the STBY
22.4.2
Recovery from the hardware standby mode requires inputs at both the STBY and RES pins. When
the STBY pin goes high, the clock oscillator begins running. The RES pin should be low at this
time and should be held low long enough for the clock to stabilize. When the RES pin changes
from low to high, the reset sequence is executed and the chip returns to the program execution
state.
2. Do not change the inputs at the mode pins (MD
Hardware Standby Mode
Transition to Hardware Standby Mode
Recovery from Hardware Standby Mode
pin goes low.
Be particularly careful not to let both mode pins go low in hardware standby mode,
since that places the chip in writer mode and increases current dissipation.
1
, MD
0
) during hardware standby mode.
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