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參數(shù)資料
| 型號(hào)： | 68HC705PL4 |
| 廠商： | Motorola, Inc. |
| 英文描述： | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 中文描述： | 8位微控制器單元（MCU）。（8位微控制器） |
| 文件頁(yè)數(shù)： | 33/98頁(yè) |
| 文件大?。?/td> | 1019K |
| 代理商： | 68HC705PL4 |
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April 30, 1998
GENERAL RELEASE SPECIFICATION
MC68HC05PL4
REV 2.0
RESETS
MOTOROLA
5-1
SECTION 5
RESETS
This section describes the four reset sources and how they initialize the MCU. A
reset immediately stops the operation of the instruction being executed, initializes
certain control bits, and loads the program counter with a user defined reset vec-
tor address. The following conditions produce a reset:
Initial power-up of device (power-on reset)
A logic zero applied to the RESET pin (external reset)
Time-out of the COP watchdog (COP reset)
Fetch of an opcode from an address not in the memory map
(illegal address reset)
Figure 5-1. Reset Sources
5.1
POWER-ON RESET
A positive transition on the V
DD
pin generates a power on reset. The power-on
reset is strictly for conditions during powering up and cannot be used to detect
drops in power supply voltage.
RESET
RESET
LATCH
R
C
COP WATCHDOG
POWER-ON RESET
ILLEGAL ADDRESS RESET
INTERNAL
ADDRESS BUS
D
INTERNAL
CLOCK
S
RST
TO CPU
AND
SUBSYSTEMS
V
DD
4-CYCLE
COUNTER
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 68HC705PL4B | 8-Bit Microcontroller Units (MCU).(8位微控制器) |
| 68HC908JB8FS | Freescale Semiconductor, Inc. |
| 69190-405 | 50/100M SOT-23 CMOS RF LDO REGULATORS |
| 6A20G | CURRENT 6.0 Amperes VOLTAGE 50 to 1000 Volts |
| 6A40G | CURRENT 6.0 Amperes VOLTAGE 50 to 1000 Volts |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 68HC705PL4B | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Industry standard 8-bit M68HC05 CPU core |
| 68HC705RC17 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Genneral Release Specification |
| 68HC705SB7 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:SPECIFICATION (General Release) |
| 68HC705SJ7 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification |
| 68HC705SP7 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification |
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