HD6473258P10 Renesas Electronics America, HD6473258P10 Datasheet - Page 228

• 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: -

The NMI edge bit (NMIEG) in the system control register is originally cleared to 0, selecting the
falling edge. When NMI goes low, the NMI interrupt handling routine sets NMIEG to 1 (selecting
the rising edge), sets SSBY to 1, then executes the SLEEP instruction. The chip enters the software
standby mode. It recovers from the software standby mode on the next rising edge of NMI.
12.4.4 Notes on Current Dissipation
1. The I/O ports remain in their current states in software standby mode. If a port is in the high
2. When software standby mode is entered under condition (a) or (b) below, current dissipation is
output state, it continues to dissipate power in proportion to the output current.
higher (I
(a) In single-chip mode (mode 3): when software standby mode is entered by executing an
Clock
generator
NMI
NMIEG
SSBY
Ø
instruction stored in on-chip ROM, after even one instruction not stored in on-chip ROM
has been fetched (e.g. from on-chip RAM).
CC
= 100 to 300 µA) than normal in standby mode.
Figure 12-1. Software Standby Mode NMI Timing (Example)
NMI interrupt handler
NMIEG = 1
SSBY = 1
Software standby mode
SLEEP
(power-down state)
224
Settling time
Fig 12-1
NMI interrupt handler