HD64F3437TFI16V Renesas Electronics America, HD64F3437TFI16V Datasheet - Page 575

• 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

22.1
The H8/3437 Series has a power-down state that greatly reduces power consumption by stopping
some or all of the chip functions. The power-down state includes three modes:
1. Sleep mode
2. Software standby mode
3. Hardware standby mode
Table 22.1 lists the conditions for entering and leaving the power-down modes. It also indicates
the status of the CPU, on-chip supporting modules, etc. in each power-down mode.
Table 22.1 Power-Down State
Mode
Sleep
mode
Software
standby
mode
Hardware
standby
mode
Notes: 1. SYSCR: System control register
2. SSBY:
Overview
Entering
Procedure
Execute
SLEEP
instruction
Set SSBY bit
in SYSCR to
1, then
execute
SLEEP
instruction
Set STBY
pin to low
level
Software standby bit
Section 22 Power-Down State
Clock
Run
Halt
Halt
CPU
Halt
Halt
Halt
CPU
Reg’s.
Held
Held
Not
held
Sup.
Mod.
Run
Halt and
initialized
Halt and
initialized
RAM
Held
Held
Held
I/O
Ports
Held
Held
High
impe-
dance
state
Exiting
Methods
Interrupt
RES
STBY
NMI
IRQ
IRQ
KEYIN
KEYIN
RES
STBY
STBY and
RES
0
6
–IRQ
(incl.
0
15
–
)
543
2