- 您现在的位置：买卖IC网 > PDF目录370133 > 7534 (Renesas Technology Corp.) SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER PDF资料下载
参数资料
| 型号： | 7534 |
| 厂商： | Renesas Technology Corp. |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 单芯片8位CMOS微机 |
| 文件页数： | 19/55页 |
| 文件大小： | 610K |
| 代理商： | 7534 |
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页第15页第16页第17页第18页当前第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
7534 Group
Rev.2.00 Jun 21, 2004 page 19 of 54
REJ03B0099-0200Z
Timers
The 7534 Group has 3 timers: timer X, timer 1 and timer 2.
The division ratio of every timer and prescaler is 1/(n+1) provided
that the value of the timer latch or prescaler is n.
All the timers are down count timers. When a timer reaches “0”, an
underflow occurs at the next count pulse, and the corresponding timer
latch is reloaded into the timer. When a timer underflows, the inter-
rupt request bit corresponding to each timer is set to “1”.
G
Timer 1, Timer 2
Prescaler 12 always counts f(X
IN
)/16. Timer 1 and timer 2 always
count the prescaler output and periodically sets the interrupt request
bit.
G
Timer X
Timer X can be selected in one of 4 operating modes by setting the
timer X mode register.
Timer Mode
The timer counts the signal selected by the timer X count source
selection bit.
Pulse Output Mode
The timer counts the signal selected by the timer X count source
selection bit, and outputs a signal whose polarity is inverted each
time the timer value reaches “0”, from the CNTR
0
pin.
When the CNTR
0
active edge switch bit is “0”, the output of the
CNTR
0
pin is started with an “H” output.
At “1”, this output is started with an “L” output. When using a timer in
this mode, set the port P1
4
direction register to output mode.
Event Counter Mode
The operation in the event counter mode is the same as that in the
timer mode except that the timer counts the input signal from the
CNTR
0
pin.
When the CNTR
0
active edge switch bit is “0”, the timer counts
the rising edge of the CNTR
0
pin. When this bit is “1”, the timer
counts the falling edge of the CNTR
0
pin.
Pulse Width Measurement Mode
When the CNTR
0
active edge switch bit is “0”, the timer counts the
signal selected by the timer X count source selection bit while the
CNTR
0
pin is “H”. When this bit is “1”, the timer counts the signal
while the CNTR
0
pin is “L”.
In any mode, the timer count can be stopped by setting the timer X
count stop bit to “1”. Each time the timer overflows, the interrupt
request bit is set.
Fig. 19 Structure of timer X mode register
Fig. 20 Timer count source set register
Timer X mode register
(TM : Address 002B
16
)
Timer X operating mode bits
b1 b0
0 0 : Timer mode
0 1 : Pulse output mode
1 0 : Event counter mode
1 1 : Pulse width measurement mode
CNTR
0
active edge switch bit
0 : Interrupt at falling edge
Count at rising edge
(in event counter mode)
1 : Interrupt at rising edge
Count at falling edge
(in event counter mode)
Timer X count stop bit
0 : Count start
1 : Count stop
Not used (return “0” when read)
b7 b0
Timer count source set register
(TCSS : Address 002E
16
)
Timer X count source selection bit (Note)
0 : f(X
IN
)/16
1 : f(X
IN
)/2
b7 b0
Not used (return “0” when read)
Note :
To switch the timer X count source selection bit ,
stop the timer X count operation.
相关PDF资料 |
PDF描述 |
|---|---|
| 7548 | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 7549 | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 75HQ | SCHOTTKY RECTIFIER |
| 75HQ030 | SCHOTTKY RECTIFIER |
| 75HQ035 | SCHOTTKY RECTIFIER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 7534_06 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER |
| 75340 | 功能描述:BIT MICRO HEX SYST4 4.0MM 28MM RoHS:否 类别:工具 >> 螺钉和螺母驱动器 - 刀片和位 系列:系统 4 标准包装:1 系列:TorqueVario™ 类型:十字槽刀片 尺寸:#2 长度:7.48"（190mm） 特点:绝缘达 10,000V 重量:0.07 磅（31.75g） |
| 753-40.4M-A | 制造商:OSCILENT 制造商全称:Oscilent Corporation 功能描述:Ceramic Trap For TV/VCR |
| 753-40.7M-A | 制造商:OSCILENT 制造商全称:Oscilent Corporation 功能描述:Ceramic Trap For TV/VCR |
| 753-402 | 制造商:WAGO Innovative Connections 功能描述:4DI 24V DC 3,0ms |
发布紧急采购，3分钟左右您将得到回复。