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參數(shù)資料
| 型號： | HD40A4639R |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 4-Bit Single-Chip Microcomputer(4位單片微計算機) |
| 中文描述： | 4位單片機（4位單片微計算機） |
| 文件頁數(shù)： | 16/133頁 |
| 文件大?。?/td> | 803K |
| 代理商： | HD40A4639R |
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HD404639R Series
16
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)
RAM
Pre-stop-mode values are retained
RAM enable flag
(RAME)
1
0
0
Port mode register C bit 2 (PMRC2)
Pre-stop-mode values
are retained
0
0
System clock select
register 1 bit 3
(SSR13)
Interrupts
The MCU has 11 interrupt sources: five external signals (
I NT
0
,
I NT
1
,
INT
2
, INT
3
, INT
4
), four
timer/counters (timers A, B, C, and D), and two serial interfaces (serial interface 1, serial interface 2).
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 INT
4
, 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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HD40A4639RF | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-Bit Single-Chip Microcomputer |
| HD40A46612 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit |
| HD40A46612H | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit |
| HD40A4668 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit |
| HD40A4668H | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit |
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