HD64F3664FY Renesas Electronics America, HD64F3664FY Datasheet - Page 91
HD64F3664FY
Manufacturer Part Number
HD64F3664FY
Description
IC H8 MCU FLASH 32K 48QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300H Tinyr
Datasheet
1.US3664-BAG1.pdf
(446 pages)
Specifications of HD64F3664FY
Core Processor
H8/300H
Core Size
16-Bit
Speed
16MHz
Connectivity
I²C, SCI
Peripherals
PWM, WDT
Number Of I /o
29
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
48-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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3.4.2
Each on-chip peripheral module has a flag to show the interrupt request status and the enable bit to
enable or disable the interrupt. For timer A interrupt requests and direct transfer interrupt requests
generated by execution of a SLEEP instruction, this function is included in IRR1 and IENR1.
When an on-chip peripheral module requests an interrupt, the corresponding interrupt request
status flag is set to 1, requesting the CPU of an interrupt. When this interrupt is accepted, the I bit
is set to 1 in CCR. These interrupts can be masked by writing 0 to clear the corresponding enable
bit.
3.4.3
Interrupts are controlled by an interrupt controller.
Interrupt operation is described as follows.
1. If an interrupt occurs while the NMI or interrupt enable bit is set to 1, an interrupt request
2. When multiple interrupt requests are generated, the interrupt controller requests to the CPU for
3. The CPU accepts the NMI and address break without depending on the I bit value. Other
4. If the CPU accepts the interrupt after processing of the current instruction is completed,
5. Then, the I bit of CCR is set to 1, masking further interrupts excluding the NMI and address
6. Next, the CPU generates the vector address corresponding to the accepted interrupt, and
Figure 3.3 shows a typical interrupt sequence where the program area is in the on-chip ROM and
the stack area is in the on-chip RAM.
signal is sent to the interrupt controller.
the interrupt handling with the highest priority at that time according to table 3.1. Other
interrupt requests are held pending.
interrupt requests are accepted, if the I bit is cleared to 0 in CCR; if the I bit is set to 1, the
interrupt request is held pending.
interrupt exception handling will begin. First, both PC and CCR are pushed onto the stack. The
state of the stack at this time is shown in figure 3.2. The PC value pushed onto the stack is the
address of the first instruction to be executed upon return from interrupt handling.
break. Upon return from interrupt handling, the values of I bit and other bits in CCR will be
restored and returned to the values prior to the start of interrupt exception handling.
transfers the address to PC as a start address of the interrupt handling-routine. Then a program
starts executing from the address indicated in PC.
Internal Interrupts
Interrupt Handling Sequence
Rev. 6.00 Mar. 24, 2006 Page 61 of 412
Section 3 Exception Handling
REJ09B0142-0600
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