D12312SVF20V Renesas Electronics America, D12312SVF20V Datasheet - Page 136

• Manufacturer Part Number: D12312SVF20V
• Description: IC H8S/2312S MCU ROMLESS 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of D12312SVF20V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-QFP
• For Use With: EDK2329 - DEV EVALUATION KIT H8S/2329
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Section 4 Exception Handling
4.2
4.2.1
A reset has the highest exception priority.
When the RES pin goes low, all processing halts and the chip enters the reset state. A reset
initializes the internal state of the CPU and the registers of on-chip supporting modules.
Immediately after a reset, interrupt control mode 0 is set.
Reset exception handling begins when the RES pin changes from low to high.
A reset can also be caused by watchdog timer overflow. For details see section 11, Watchdog
Timer.
4.2.2
The chip enters the reset state when the RES pin goes low.
To ensure that the chip is reset, hold the RES pin low for at least 20 ms at power-up. To reset the
chip during operation, hold the RES pin low for at least 20 states.
When the RES pin goes high after being held low for the necessary time, the chip starts reset
exception handling as follows:
1. The internal state of the CPU and the registers of the on-chip supporting modules are
2. The reset exception vector address is read and transferred to the PC, and program execution
Figure 4.2 shows an example of the reset sequence.
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initialized, the T bit is cleared to 0 in EXR, and the I bit is set to 1 in EXR and CCR.
starts from the address indicated by the PC.
Reset
Overview
Reset Sequence