DF2505FC26V Renesas Electronics America, DF2505FC26V Datasheet - Page 126

• Manufacturer Part Number: DF2505FC26V
• Description: IC H8S/2505 MCU FLASH 144QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2500r

Specifications of DF2505FC26V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 26MHz
• Connectivity: I²C, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 104
• Program Memory Size: 384KB (384K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 4 Exception Handling
4.3.2
When the RES or MRES pin goes low, this LSI enters the reset state. To ensure that this LSI is
reset, hold the RES pin low for at least 20 ms at power-up. To reset the chip during operation, hold
the RES or MRES pin low for at least 20 states.
When the RES or MRES pin goes high after being held low for the necessary time, this LSI starts
reset exception handling as follows:
1. The internal state of the CPU and the registers of the on-chip peripheral modules are
2. The reset exception handling vector address is read and transferred to the PC, and program
Figures 4.1 shows an example of the reset sequence.
Rev. 6.00 Sep. 24, 2009 Page 78 of 928
REJ09B0099-0600
initialized, the T bit in EXR is cleared to 0, and the I bits in EXR and CCR are set to 1.
execution starts from the address indicated by the PC.
(1)(3) Reset exception handling vector address (At a reset, (1) = H'000000; (3) = H'000002)
(2)(4) Start address (contents of reset exception handling vector address)
(5)
(6)
Figure 4.1 Reset Sequence (Advanced Mode with On-Chip ROM Enabled)
Reset Exception Handling
Internal
address bus
Internal read
signal
Internal write
signal
Internal data
bus
φ
RES
Start address ((5) = (2) (4))
First instruction of a program
(1)
Vector fetch
(2)
High
(4)
Internal
processing
(3)
Fetch first instruction
of a program
(5)
(6)