HD6433682 ETC, HD6433682 Datasheet - Page 92
HD6433682
Manufacturer Part Number
HD6433682
Description
Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series
Manufacturer
ETC
Datasheet
1.HD6433682.pdf
(504 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
HD6433682A45HV
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
Part Number:
HD6433682C74HV
Manufacturer:
HITACHI/日立
Quantity:
20 000
- Current page: 92 of 504
- Download datasheet (3Mb)
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.
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.
Figure 3.4 shows a port mode register setting and interrupt request flag clearing procedure.
Rev. 3.00, 05/03, page 62 of 472
Figure 3.4 Port Mode Register Setting and Interrupt Request Flag Clearing Procedure
Interrupts after Reset
Usage Notes
Notes on Stack Area Use
Notes on Rewriting Port Mode Registers
Clear interrupt request flag to 0
Set port mode register bit
Execute NOP instruction
CCR I bit
CCR I bit
1
0
Interrupts masked. (Another possibility
is to disable the relevant interrupt in
interrupt enable register 1.)
After setting the port mode register bit,
first execute at least one instruction
(e.g., NOP), then clear the interrupt
request flag to 0.
Interrupt mask cleared
Related parts for HD6433682
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
E-Series RF 1:1 Transformer 1710 - 1910 MHz
Manufacturer:
Tyco Electronics
Datasheet:
Part Number:
Description:
LINEAR INTEGRATED CIRCUITS 3-TERMINAL VOLATGE REGULATORS
Manufacturer:
ETC ETC
Datasheet:
Part Number:
Description:
Simple function, 50 to 600W DC-DC converters
Manufacturer:
ETC ETC
Datasheet:
Part Number:
Description:
FC050S6R5POWER MODULES: DC-DC CONVERTERS; 18 TO 36 VDC INPUT, 6.5VDC OUTPUT; 50 W TO 150W
Manufacturer:
ETC ETC
Datasheet:
Part Number:
Description:
Disk OnChip 2000 DIP
Manufacturer:
ETC ETC
Datasheet:
Part Number:
Description:
512K x 16Bit x 2Banks Synchronous DRAM
Manufacturer:
ETC ETC
Datasheet:
Part Number:
Description:
5-Bit Shift Register Product Specfication
Manufacturer:
ETC ETC
Datasheet:
Part Number:
Description:
2N191alloy-junction germanium transistors
Manufacturer:
ETC ETC
Datasheet:
Part Number:
Description:
RTL8139DREALTEK SINGLE CHIP FAST ETHERNET CONTROLLER WITH POWER MANAGEMENT
Manufacturer:
ETC ETC
Datasheet:
Part Number:
Description:
M11B416256A-25J256 K x 16 DRAM EDO PAGE MODE
Manufacturer:
ETC ETC
Datasheet:
Part Number:
Description:
IFR3000IFR3500 Rx IF/BASEBAND PROCESSOR
Manufacturer:
ETC ETC
Datasheet:
Part Number:
Description:
78M08LINEAR INTEGRATED CIRCUITS 3-TERMINAL VOLATGE REGULATORS
Manufacturer:
ETC ETC
Datasheet:
Part Number:
Description:
CS4231A-KLPARALLEL INTERFACE MULTIMEDIA AUDIO CODEC
Manufacturer:
ETC ETC
Datasheet:
Part Number:
Description:
CS4231A-KQPARALLEL INTERFACE MULTIMEDIA AUDIO CODEC
Manufacturer:
ETC ETC
Datasheet:
Part Number:
Description:
BC41B143A05-IRK-E4BlueCpre 4-ROM Single Chip Bluetooth v2.0 System with EDR
Manufacturer:
ETC ETC
Datasheet: