HD64F3664H Renesas Electronics America, HD64F3664H Datasheet - Page 94
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HD64F3664H
Manufacturer Part Number
HD64F3664H
Description
IC H8 MCU FLASH 32K 64QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300H Tinyr
Datasheet
1.US3664-BAG1.pdf
(446 pages)
Specifications of HD64F3664H
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
64-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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Section 3 Exception Handling
3.5
3.5.1
If an interrupt is accepted after a reset and before the stack pointer (SP) is initialized, the 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. Since the first instruction of a program is
always executed immediately after the reset state ends, make sure that this instruction initializes
the stack pointer (example: MOV.W #xx: 16, SP).
3.5.2
When word data is accessed the least significant bit of the address is regarded as 0. Access to the
stack always takes place in word size, so the stack pointer (SP: R7) should never indicate an odd
address. Use PUSH Rn (MOV.W Rn, @–SP) or POP Rn (MOV.W @SP+, Rn) to save or restore
register values.
3.5.3
When a port mode register is rewritten to switch the functions of external interrupt pins, IRQ3 to
IRQ0, and WKP5 to WKP0, the interrupt request flag may be set to 1.
Figure 3.4 shows a port mode register setting and interrupt request flag clearing procedure.
When switching a pin function, mask the interrupt before setting the bit in the port mode register.
After accessing the port mode register, execute at least one instruction (e.g., NOP), then clear the
interrupt request flag from 1 to 0.
Rev. 6.00 Mar. 24, 2006 Page 64 of 412
REJ09B0142-0600
Usage Notes
Interrupts after Reset
Notes on Stack Area Use
Notes on Rewriting Port Mode Registers
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