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參數(shù)資料
型號(hào)： ADUC845
廠(chǎng)商： Analog Devices, Inc.
元件分類(lèi)： ADC
英文描述： MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU
中文描述： MicroConverter的多通道ADC的24-/16-Bit與嵌入式62 kB閃存以及單周期控制器
文件頁(yè)數(shù)： 70/108頁(yè)
文件大小： 1109K
代理商： ADUC845
ADuC845/ADuC847/ADuC848
TIME INTERVAL COUNTER (TIC)
A TIC is provided on-chip for counting longer intervals than
the standard 8051 compatible timers can count. The TIC is
capable of timeout intervals ranging from 1/128 second to 255
hours. Also, this counter is clocked by the external 32.768 kHz
crystal rather than by the core clock, and it can remain active in
power-down mode and time long power-down intervals. This
has obvious applications for remote battery-powered sensors
where regular widely spaced readings are required. Note that
instructions to the TIC SFRs are also clocked at 32.768 kHz, so
sufficient time must be allowed in user code for these instructions
to execute.
Rev. A | Page 70 of 108
Six SFRs are associated with the time interval counter, TIMECON
being its control register. Depending on the configuration of the
IT0 and IT1 bits in TIMECON, the selected time counter register
overflow clocks the interval counter. When this counter is equal
to the time interval value loaded in the INTVAL SFR, the TII bit
(TIMECON.2) is set and generates an interrupt, if enabled. If
the part is in power-down mode, again with TIC interrupt
enabled, the TII bit wakes up the device and resumes code
execution by vectoring directly to the TIC interrupt service
vector address at 0053H. The TIC-related SFRs are described in
Table 45. Note also that the time based SFRs can be written
initially with the current time; the TIC can then be controlled
and accessed by user software. In effect, this facilitates the
implementation of a real-time clock. A basic block diagram of
the TIC is shown in Figure 47.
Because the TIC is clocked directly from a 32 kHz external
crystal on the parts, instructions that access the TIC registers
are also clocked at 32 kHz (not at the core frequency). The user
must ensure that sufficient time is given for these instructions
to execute.
8-BIT
PRESCALER
HUNDREDTHS COUNTER
HTHSEC
SECOND COUNTER
SEC
MINUTMIN
HOUR COUNTER
HOUR
TIEN
INTERVAL TIMEOUT
TIME INTERVAL COUNTER INTERRUPT
INTERV8-BIT
INTVAL SFR
INTERVAL
TIMEBASE
MUX
TCEN
32.768kHz EXTERNAL CRYSTAL
ITS0 ITS1
EQUAL
0
Figure 47. TIC Simplified Block Diagram
相關(guān)PDF資料
PDF描述
ADUC845BCP8-3 MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU
ADUC847BCP8-3 MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU
ADUC845BCP8-5 MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU
ADUC847BCP8-5 MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU
ADUC845BCP62-3 MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADUC845_12 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:MicroConverter?? Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU
ADUC845BCP32-3 制造商:Analog Devices 功能描述:10 CHANNEL 24 BIT DUAL ADC + FAST 8BIT UP - Trays
ADUC845BCP32-5 制造商:Analog Devices 功能描述:10 CHANNEL 24 BIT DUAL ADC + FAST 8BIT UP - Trays
ADUC845BCP62-3 制造商:Analog Devices 功能描述:MCU 8-bit ADuC8xx 8052 CISC 62KB Flash 3.3V/5V 56-Pin LFCSP EP
ADUC845BCP62-5 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU
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