參數(shù)資料
型號(hào)： M37548G3FP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO20
封裝： 4.40 X 6.50 MM, 0.65 MM PITCH, PLASTIC, LSSOP-20
文件頁數(shù)： 75/84頁
文件大小： 1427K
代理商： M37548G3FP
Rev.2.02
Mar 31, 2009
Page 77 of 81
REJ03B0210-0202
7548 Group
Notes on Interrupts
1. Change of relevant register settings
1. Change of relevant register settings
When not requiring for the interrupt occurrence synchronous
with the following case, take the sequence shown in Figure 90.
When switching external interrupt active edge
When switching interrupt sources of an interrupt vector
address where two or more interrupt sources are allocated
Fig 90. Sequence of changing relevant register
<Reason>
When setting the followings, the interrupt request bit of the
corresponding interrupt may be set to “1”.
When switching external interrupt active edge
INT0 interrupt edge selection bit
(bit 0 of Interrupt edge selection register (address 003A16))
INT1 interrupt edge selection bit
(bit 1 of Interrupt edge selection register)
Capture 0 interrupt edge selection bit
(bits 1 and 0 of capture mode register (address 3216))
Capture 1 interrupt edge selection bit
(bits 3 and 2 of capture mode register)
2. Check of interrupt request bit
When executing the BBC or BBS instruction to determine an
interrupt request bit immediately after this bit is set to “0”, take
the following sequence.
<Reason>
If the BBC or BBS instruction is executed immediately after an
interrupt request bit is cleared to “0”, the value of the interrupt
request bit before being cleared to “0” is read.
Fig 91. Sequence of check of interrupt request bit
Notes on Timers
1. Division Ratio of Timers 1, 2, and A
When n (0 to 255) is written to a timer latch, the frequency
division ratio is 1/(n
+1).
2. Switching Count Source of Timers 1, 2, and A
When a count source of timer 1, timer 2 or timer A is switched,
stop a count of the timer.
3. Reading from and Writing to Timers 1, 2, and
Prescaler 12
or
or
Set the interrupt edge selection bit active edge
switch bit, or the interrupt source selection bit.
NOP (One or more instructions)
Set the corresponding interrupt enable bit to
“0” (disabled).
Set the corresponding interrupt request bit to “0”
(no interrupt request).
Set the corresponding interrupt enable bit to “1”
(enabled).
NOP (one or more instructions)
Set the interrupt request bit to “0” (no interrupt issued)
Execute the BBC or BBS instruction
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M37548G3FP#U0 功能描述:MCU 6K ROM 256K 20-SSOP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 標(biāo)準(zhǔn)包裝:250 系列:LPC11Uxx 核心處理器:ARM? Cortex?-M0 芯體尺寸:32-位 速度:50MHz 連通性:I²C，Microwire，SPI，SSI，SSP，UART/USART，USB 外圍設(shè)備:欠壓檢測/復(fù)位，POR，WDT 輸入/輸出數(shù):40 程序存儲(chǔ)器容量:96KB（96K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:4K x 8 RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):1.8 V ~ 3.6 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:48-LQFP 包裝:托盤 其它名稱:568-9587
M37548G3-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M37549G1FP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M37549G1-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
M37549G2FP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
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