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参数资料
| 型号： | HD404449H |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | MROM, MICROCONTROLLER, PQFP80 |
| 封装： | PLASTIC, QFP-80 |
| 文件页数： | 11/33页 |
| 文件大小： | 440K |
| 代理商： | HD404449H |
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HD404449 Series
17
Item
Abbr.
Status After
Cancellation of Stop
Mode by
STOPC Input
Status After
Cancellation of Stop
Mode by MCU Reset
Status After all Other
Types of Reset
Carry flag
(CA)
Pre-stop-mode values are not guaranteed;
values must be initialized by program
Pre-stop-mode values
are not guaranteed;
values must be
initialized by program
Accumulator
(A)
B register
(B)
W register
(W)
X/SPX register
(X/SPX)
Y/SPY register
(Y/SPY)
Serial data register (SRL, SRU)
A/D data register
(ADRL,
ADRU)
RAM
Pre-stop-mode values are retained
RAM enable flag
(RAME)
1
0
Port mode register
1 bit 2
(PMRC12)
Pre-stop-mode values
are retained
00
System clock
select register bit 3
(SSR3)
Interrupts
The MCU has 11 interrupt sources: four external signals (
INT
0, INT1, INT2, INT 3), four timer/counters
(timers A, B, C, and D), two serial interfaces (serial 1, serial 2), and A/D converter.
An interrupt request flag (IF), interrupt mask (IM), and vector address are provided for each interrupt
source, and an interrupt enable flag (IE) controls the entire interrupt process.
Some vector addresses are shared by two different interrupts. They are timer B and INT
2, timer C and
INT
3, timer D and A/D converter, and serial interface 1 and serial interface 2.
So the type of request that
has occurred must be checked at the beginning of interrupt processing.
Interrupt Control Bits and Interrupt Processing: Locations $000 to $003 and $022 to $023 in RAM are
reserved for the interrupt control bits which can be accessed by RAM bit manipulation instructions.
The interrupt request flag (IF) cannot be set by software. MCU reset initializes the interrupt enable flag
(IE) and the IF to 0 and the interrupt mask (IM) to 1.
A block diagram of the interrupt control circuit is shown in figure 9, interrupt priorities and vector
addresses are listed in table 2, and interrupt processing conditions for the 11 interrupt sources are listed in
table 3.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| HD404449SERIES | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| HD404449TF | 制造商:未知厂家 制造商全称:未知厂家 功能描述:4-Bit Microcontroller |
| HD404458 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:4-bit HMCS400-series microcomputers |
| HD404458H | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:4-bit HMCS400-series microcomputers |
| HD404459 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:4-bit HMCS400-series microcomputers |
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