- 您现在的位置：买卖IC网 > PDF目录67763 > M38049FFLWG 8-BIT, FLASH, 16.8 MHz, MICROCONTROLLER, PBGA64 PDF资料下载
参数资料
| 型号： | M38049FFLWG |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 16.8 MHz, MICROCONTROLLER, PBGA64 |
| 封装： | 6 X 6 MM, 0.65 MM PITCH, PLASTIC, LGA-64 |
| 文件页数： | 15/129页 |
| 文件大小： | 1721K |
| 代理商： | M38049FFLWG |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页当前第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页
Rev.1.00
Oct 27, 2008
Page 111 of 128
REJ03B0266-0100
3804 Group (Spec.L)
Notes on 8-bit Timer (timer 1, 2, X, Y)
If a value n (between 0 and 255) is written to a timer latch, the
frequency division ratio is 1/(n+1).
When switching the count source by the timer 12, X and Y
count source selection bits, the value of timer count is altered
in unconsiderable amount owing to generating of thin pulses in
the count input signals.
Therefore, select the timer count source before set the value to
the prescaler and the timer.
Set the double-function port of the CNTR0/CNTR1 pin and
port P54/P55 to output in the pulse output mode.
Set the double-function port of CNTR0/CNTR1 pin and port
P54/P55 to input in the event counter mode and the pulse width
measurement mode.
Notes on 16-bit Timer (timer Z)
1. Pulse output mode
Set the double-function port of the CNTR2 pin and port P47 to
output.
2. Pulse period measurement mode
Set the double-function port of the CNTR2 pin and port P47 to
input.
A read-out of timer value is impossible in this mode. The timer
can be written to only during timer stop (no measurement of
pulse period).
Since the timer latch in this mode is specialized for the read-
out of measured values, do not perform any write operation
during measurement.
“FFFF16” is set to the timer when the timer underflows or
when the valid edge of measurement start/completion is
detected.
Consequently, the timer value at start of pulse period
measurement depends on the timer value just before
measurement start.
3. Pulse width measurement mode
Set the double-function port of the CNTR2 pin and port P47 to
input.
A read-out of timer value is impossible in this mode. The timer
can be written to only during timer stop (no measurement of
pulse period).
Since the timer latch in this mode is specialized for the read-
out of measured values, do not perform any write operation
during measurement.
“FFFF16” is set to the timer when the timer underflows or
when the valid edge of measurement start/completion is
detected.
Consequently, the timer value at start of pulse width
measurement depends on the timer value just before
measurement start.
4. Programmable waveform generating mode
Set the double-function port of the CNTR2 pin and port P47 to
output.
5. Programmable one-shot generating mode
Set the double-function port of CNTR2 pin and port P47 to
output, and of INT1 pin and port P42 to input in this mode.
This mode cannot be used in low-speed mode.
If the value of the CNTR2 active edge switch bit is changed
during one-shot generating enabled or generating one-shot
pulse, then the output level from CNTR2 pin changes.
6. All modes
Timer Z write control
Which write control can be selected by the timer Z write control
bit (bit 3) of the timer Z mode register (address 002A16), writing
data to both the latch and the timer at the same time or writing
data only to the latch.
When the operation “writing data only to the latch” is selected,
the value is set to the timer latch by writing data to the address of
timer Z and the timer is updated at next underflow. After reset
release, the operation “writing data to both the latch and the timer
at the same time” is selected, and the value is set to both the latch
and the timer at the same time by writing data to the address of
timer Z.
In the case of writing data only to the latch, if writing data to the
latch and an underflow are performed almost at the same time,
the timer value may become undefined.
Timer Z read control
A read-out of timer value is impossible in pulse period
measurement mode and pulse width measurement mode. In the
other modes, a read-out of timer value is possible regardless of
count operating or stopped.
However, a read-out of timer latch value is impossible.
Switch of interrupt active edge of CNTR2 and INT1
Each interrupt active edge depends on setting of the CNTR2
active edge switch bit and the INT1 active edge selection bit.
Switch of count source
When switching the count source by the timer Z count source
se lec tion bi ts, t h e va lue of t imer count is al tered in
inconsiderable amount owing to generating of thin pulses on the
count input signals.
Therefore, select the timer count source before setting the value
to the prescaler and the timer.
相关PDF资料 |
PDF描述 |
|---|---|
| M38049FFLHP | 8-BIT, FLASH, 16.8 MHz, MICROCONTROLLER, PQFP64 |
| M38049FFLSP | 8-BIT, FLASH, 16.8 MHz, MICROCONTROLLER, PDIP64 |
| M38112E4SS | 8-BIT, UVPROM, 4.19 MHz, MICROCONTROLLER, CDIP64 |
| M38112E4-XXXFP | 8-BIT, OTPROM, 4.19 MHz, MICROCONTROLLER, PQFP64 |
| M38112E4-XXXSP | 8-BIT, OTPROM, 4.19 MHz, MICROCONTROLLER, PDIP64 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M38049RLSS | 功能描述:DEV EMULATOR CHIP RAM 2KB 64SDIP RoHS:否 类别:编程器，开发系统 >> 内电路编程器、仿真器以及调试器 系列:- 产品变化通告:Development Systems Discontinuation 19/Jul/2010 标准包装:1 系列:* 类型:* 适用于相关产品:* 所含物品:* |
| M3806 | 功能描述:电缆固定件和配件 LTSCG 625 BLACK RoHS:否 制造商:Heyco 类型:Cable Grips, Liquid Tight 材料:Nylon 颜色:Black 安装方法:Cable 最大光束直径:11.4 mm 抗拉强度: |
| M3806 BK001 | 制造商:Alpha Wire Company 功能描述:CBL 8COND 18AWG BLK 1000' |
| M3806 BK002 | 制造商:Alpha Wire Company 功能描述:CBL 8COND 18AWG BLK 500' |
| M3806 BK005 | 制造商:Alpha Wire Company 功能描述:CBL 8COND 18AWG BLK 100' |
发布紧急采购，3分钟左右您将得到回复。