HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 117

• Manufacturer Part Number: HD64F3026X25
• Description: MCU 3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3026X25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

4.2.3
If an interrupt is accepted after a reset but before the stack pointer (SP) is initialized, PC and CCR
will not be saved correctly, leading to a program crash. To prevent this, all interrupt requests,
including NMI, are disabled immediately after a reset exception handling. The first instruction of
the program is always executed immediately after the reset state ends. This instruction should
initialize the stack pointer (example: MOV.L #xx:32, SP).
4.3
Interrupt exception handling can be requested by seven external sources (NMI, IRQ
27 internal sources in the on-chip supporting modules. Figure 4.5 classifies the interrupt sources
and indicates the number of interrupts of each type.
RES
Internal
address bus
Internal
read signal
Internal
write signal
Internal
data bus
(16 bits wide)
Interrupts after Reset
Interrupts
(1) Address of reset exception handling vector (H'0000)
(2) Start address (contents of reset exception handling vector address)
(3) First instruction of program
Figure 4.4 Reset Sequence (Mode 6)
Vector fetch
(2)
(1)
Internal
processing
Rev. 2.00 Sep 20, 2005 page 77 of 800
Prefetch of
first program
instruction
Section 4 Exception Handling
(3)
(2)
REJ09B0260-0200
0
to IRQ
5
), and