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參數(shù)資料
| 型號： | M38588GCFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 6.25 MHz, MICROCONTROLLER, PDSO42 |
| 封裝： | 8.40 X 17.50 MM, 0.80 MM PITCH, PLASTIC, SSOP-42 |
| 文件頁數(shù)： | 29/77頁 |
| 文件大?。?/td> | 824K |
| 代理商： | M38588GCFP |
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Rev.1.10
Apr 3, 2006
page 35 of 75
REJ03B0139-0110
3858 Group
Timer Z2
q16-bit Timer
The timer Z2 is a 16-bit timer. When the timer reaches “000016”,
an underflow occurs at the next count pulse and the correspond-
ing timer latch is reloaded into the timer and the count is
continued. When the timer underflows, the interrupt request bit
corresponding to the timer Z2 is set to “1”.
When reading/writing to the timer Z2, perform reading/writing to
both the high-order byte and the low-order byte. When reading the
timer Z2, read from the high-order byte first, followed by the low-
order byte. Do not perform the writing to the timer Z2 between
read operation of the high-order byte and read operation of the
low-order byte. When writing to the timer Z2, write to the low-order
byte first, followed by the high-order byte. Do not perform the
reading to the timer Z2 between write operation of the low-order
byte and write operation of the high-order byte.
The timer Z2 can select the count source by the timer Z2 count
source selection bits of timer Z2 count source selection register
(bits 7 to 4 at address 003016).
Timer Z2 can select one of seven operating modes by setting the
timer Z2 mode register (address 002B16).
(1) Timer mode
qMode selection
This mode can be selected by setting “000” to the timer Z2 operat-
ing mode bits (bits 2 to 0) and setting “0” to the timer/event
counter mode switch bit (b7) of the timer Z2 mode register (ad-
dress 002B16).
qCount source selection
In high-, or middle-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/
128, 1/256, 1/512 or 1/1024 of f(XIN); or f(XCIN) can be selected as
the count source.
In low-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256, 1/
512 or 1/1024 of f(XCIN); or f(XCIN) can be selected as the count
source.
qInterrupt
When an underflow occurs, the timer Z2/CNTR3 interrupt request
bit (bit 5) of the interrupt request register 1 (address 003C16) is set
to “1”.
qExplanation of operation
During timer stop, usually write data to a latch and a timer at the
same time to set the timer value.
The timer count operation is started by setting “0” to the timer Z2
count stop bit (bit 6) of the timer Z2 mode register (address
002B16).
When the timer reaches “000016”, an underflow occurs at the next
count pulse and the contents of timer latch are reloaded into the
timer and the count is continued.
When writing data to the timer during operation, the data is written
only into the latch. Then the new latch value is reloaded into the
timer at the next underflow.
(2) Event counter mode
qMode selection
This mode can be selected by setting “000” to the timer Z2 operat-
ing mode bits (bits 2 to 0) and setting “1” to the timer/event
counter mode switch bit (bit 7) of the timer Z2 mode register (ad-
dress 002B16).
The valid edge for the count operation depends on the CNTR3 ac-
tive edge switch bit (bit 5) of the timer Z2 mode register (address
002B16). When it is “0”, the rising edge is valid. When it is “1”, the
falling edge is valid.
qInterrupt
The interrupt at an underflow is the same as the timer mode’s.
qExplanation of operation
The operation is the same as the timer mode’s.
Set the double-function port of CNTR3 pin and port P23 to input in
this mode.
Figure 30 shows the timing chart of the timer/event counter mode.
(3) Pulse output mode
qMode selection
This mode can be selected by setting “001” to the timer Z2 operat-
ing mode bits (bits 2 to 0) and setting “0” to the timer/event
counter mode switch bit (b7) of the timer Z2 mode register (ad-
dress 002B16).
qCount source selection
In high-, or middle-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/
128, 1/256, 1/512 or 1/1024 of f(XIN); or f(XCIN) can be selected as
the count source.
In low-speed mode, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128, 1/256, 1/
512 or 1/1024 of f(XCIN); or f(XCIN) can be selected as the count
source.
qInterrupt
The interrupt at an underflow is the same as the timer mode’s.
qExplanation of operation
The operation is the same as the timer mode’s. Moreover the
pulse which is inverted each time the timer underflows is output
from CNTR3 pin. When the CNTR3 active edge switch bit (bit 5) of
the timer Z2 mode register (address 002B16) is “0”, the output
starts with “H” level. When it is “1”, the output starts with “L” level.
sPrecautions
The double-function port of CNTR3 pin and port P23 is automati-
cally set to the timer pulse output port in this mode.
The output from CNTR3 pin is initialized to the level depending on
CNTR3 active edge switch bit by writing to the timer.
When the value of the CNTR3 active edge switch bit is changed,
the output level of CNTR3 pin is inverted.
Figure 31 shows the timing chart of the pulse output mode.
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| M38588GCFP#U0 | 功能描述:IC 740/3858 MCU QZ-ROM 42SSOP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 標準包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI，I²C，UART/USART 外圍設(shè)備:POR，PWM，WDT 輸入/輸出數(shù):40 程序存儲器容量:- 程序存儲器類型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-LCC（J 形引線） 包裝:帶卷 (TR) |
| M38588GCSP#U0 | 功能描述:IC 740/3858 MCU QZ-ROM 42DIP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 標準包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI，I²C，UART/USART 外圍設(shè)備:POR，PWM，WDT 輸入/輸出數(shù):40 程序存儲器容量:- 程序存儲器類型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-LCC（J 形引線） 包裝:帶卷 (TR) |
| M3860 | 功能描述:電纜固定件和配件 FLEX LTSCG 500 RoHS:否 制造商:Heyco 類型:Cable Grips, Liquid Tight 材料:Nylon 顏色:Black 安裝方法:Cable 最大光束直徑:11.4 mm 抗拉強度: |
| M3860 BK001 | 制造商:Alpha Wire Company 功能描述:CBL 30COND 14AWG BLK 1000' |
| M3860 BK002 | 制造商:Alpha Wire Company 功能描述:CBL 30COND 14AWG BLK 500' |
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