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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： | 9/33页 |
| 文件大小： | 440K |
| 代理商： | HD404449H |
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HD404449 Series
15
Table 1
Initial Values After MCU Reset
Item
Abbr.
Initial
Value
Contents
Program counter
(PC)
$0000
Indicates program execution point from start
address of ROM area
Status flag
(ST)
1
Enables conditional branching
Stack pointer
(SP)
$3FF
Stack level 0
Interrupt
flags/mask
Interrupt enable flag
(IE)
0
Inhibits all interrupts
Interrupt request flag
(IF)
0
Indicates there is no interrupt request
Interrupt mask
(IM)
1
Prevents (masks) interrupt requests
I/O
Port data register
(PDR)
All bits 1
Enables output at level 1
Data control register
(DCD0–
DCD2)
All bits 0
Turns output buffer off (to high impedance)
(DCR0–
DCRC)
All bits 0
Port mode register A
(PMRA)
0000
Refer to description of port mode register A
Port mode register B
(PMRB)
- 000
Refer to description of port mode register B
Port mode register C
(PMRC)
0000
Refer to description of port mode register C
Detection edge select
register 1
(ESR1)
0000
Disables edge detection
Detection edge select
register 2
(ESR2)
00 - -
Disables edge detection
Timer/
counters,
serial
interface
Timer mode register A
(TMA)
0000
Refer to description of timer mode register A
Timer mode register B1
(TMB1)
0000
Refer to description of timer mode register B1
Timer mode register B2
(TMB2)
- - 00
Refer to description of timer mode register B2
Timer mode register C1
(TMC1)
0000
Refer to description of timer mode register C1
Timer mode register C2
(TMC2)
- 000
Refer to description of timer mode register C2
Timer mode register D1
(TMD1)
0000
Refer to description of timer mode register D1
Timer mode register D2
(TMD2)
0000
Refer to description of timer mode register D2
Serial mode register 1A
(SM1A)
0000
Refer to description of serial mode register 1A
Serial mode register 1B
(SM1B)
- - 00
Refer to description of serial mode register 1B
Serial mode register 2A
(SM2A)
0000
Refer to description of serial mode register 2A
Serial mode register 2B
(SM2B)
- 000
Refer to description of serial mode register 2B
Prescaler S
(PSS)
$000
—
Prescaler W
(PSW)
$00
—
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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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