HD6473258P10 Renesas Electronics America, HD6473258P10 Datasheet - Page 223

• Manufacturer Part Number: HD6473258P10
• Description: IC H8 MCU OTP 32K 64DIP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/325r

Specifications of HD6473258P10

• Core Processor: H8/300
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SCI, UART/USART
• Number Of I /o: 53
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 64-DIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Peripherals: -

12.1 Overview
The H8/325 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 – a software-triggered mode in which the CPU halts but the rest of the chip
(2) Software standby mode – a software-triggered mode in which the entire chip is inactive
(3) Hardware standby mode – a hardware-triggered mode in which the entire chip is inactive
Table 12-1 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 12-1. Power-Down State
Mode
Sleep
mode
Soft-
ware
standby
mode
Hard-
ware
standby
mode
* On-chip supporting modules.
Notes
1. SYSCR: System control register
2. SSBY:
remains active
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 12. Power-Down State
Clock CPU
Run
Halt
Halt
Halt
Halt
Halt
CPU
Reg’s. Mod.* RAM
Held
Held
Not
held
219
Sup.
Run
Halt
and
initial-
ized
Halt
and
initialized
Held
Held
Held
I/O
ports
High
impe-
dance
state
Held
Held
Exiting
methods
• Interrupt
• RES
• STBY
• NMI
• IRQ
• STBY
• RES
• IS
• STBY high,
then RES
low
0
– IRQ
high
2