參數(shù)資料
型號: MC68HRC705J5ACDWR3
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO20
封裝: SOIC-20
文件頁數(shù): 66/106頁
文件大?。?/td> 1069K
代理商: MC68HRC705J5ACDWR3
GENERAL RELEASE SPECIFICATION
July 16, 1999
MOTOROLA
16-BIT TIMER
MC68HC05J5A
9-4
REV 2.1
counter will not have any effect on the T1OF ag bit and Timer interrupts. The
alternate counter registers include a transparent buffer latch on the LSB of the 16-
bit timer counter.
Figure 9-4. Alternate Counter Block Diagram
The alternate counter registers (ACNTH, ACNTL) shown in Figure 9-5 are read-
only locations which contain the current high and low bytes of the 16-bit free-run-
ning counter. Writing to the alternate counter registers has no effect. Reset of the
device presets the timer counter to $FFFC.
The ACNTL latch is a transparent read of the LSB until the a read of the ACNTH
takes place. A read of the ACNTH latches the LSB into the ACNTL location until
the ACNTL is again read. The latched value remains xed even if multiple reads of
the ACNTH take place before the next read of the ACNTL. Therefore, when read-
ing the MSB of the timer at ACNTH the LSB of the timer at ACNTL must also be
read to complete the read sequence.
During power-on-reset (POR), the counter is initialized to $FFFC and begins
counting after the oscillator start-up delay. Because the counter is 16 bits and pre-
ceded by a xed divide-by-four prescaler, the value in the counter repeats every
262,144 internal bus clock cycles (524,288 oscillator cycles).
Reading the ACNTH and ACNTL in any order or any number of times does not
have any effect on the 16-bit free-running counter or the T1OF ag bit.
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
ACNTH
R
Bit15
Bit14
Bit13
Bit12
Bit11
Bit10
Bit9
Bit8
$001A
W
reset:
11111111
ACNTL
R
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
$001B
W
reset:
11111100
Figure 9-5. Alternate Counter Registers (ACNTH, ACNTL)
ACNTH ($1A)
TMR LSB
16-BIT COUNTER
÷ 4
INTERNAL
(fOSC ÷ 2)
RESET
CLOCK
ACNTL ($1B)
INTERNAL
($FFFC)
DATA
READ
ACNTH
READ
ACNTL
READ
LATCH
BUS
相關(guān)PDF資料
PDF描述
MC68HRC05J5ADWR2 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20
MC68HC705J5ACDWR2 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO20
MC68HC05J5AJDWR3 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO16
MC68HC05J5ADWR2 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20
MC68HC05J5AJDWR2 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HRC705JJ7CDW 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述:
MC68HRC705JP7CP 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68HRC705KJ1CP 功能描述:IC MCU 1.2K 4MHZ OTP 16-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:HC05 標準包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN,SCI,SPI 外圍設(shè)備:POR,PWM,溫度傳感器,WDT 輸入/輸出數(shù):21 程序存儲器容量:40KB(20K x 16) 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323
MC68HRC908JK1CDW 功能描述:IC MCU FLASH 8BIT 1.5K 20-SOIC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:HC08 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標準包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C,IrDA,LIN,SPI,UART/USART 外圍設(shè)備:DMA,PDR,POR,PVD,PWM,溫度傳感器,WDT 輸入/輸出數(shù):26 程序存儲器容量:64KB(64K x 8) 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN,36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND
MC68HRC908JK1CP 功能描述:IC MCU FLASH 8BIT 1.5K 20-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:HC08 其它有關(guān)文件:STM32F101T8 View All Specifications 特色產(chǎn)品:STM32 32-bit Cortex MCUs 標準包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C,IrDA,LIN,SPI,UART/USART 外圍設(shè)備:DMA,PDR,POR,PVD,PWM,溫度傳感器,WDT 輸入/輸出數(shù):26 程序存儲器容量:64KB(64K x 8) 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 10x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN,36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND