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| 型号： | M37546G2SP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32 |
| 封装： | 8.90 X 28 MM, 1.78 MM PITCH, PLASTIC, SDIP-32 |
| 文件页数： | 31/105页 |
| 文件大小： | 1105K |
| 代理商： | M37546G2SP |
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REJ03B0160-0122 Rev.1.22 Mar 13, 2009
page 29 of 100
7546 Group
(4) Pulse width measurement mode
In the pulse width measurement mode, the pulse width of the sig-
nal input to P14/CNTR0 pin is measured.
The operation of Timer X can be controlled by the level of the sig-
nal input from the CNTR0 pin.
When the CNTR0 active edge switch bit is “0”, the signal selected
by the timer X count source selection bit is counted while the input
signal level of CNTR0 pin is “H”. The count is stopped while the
pin is “L”. Also, when the CNTR0 active edge switch bit is “1”, the
signal selected by the timer X count source selection bit is
counted while the input signal level of CNTR0 pin is “L”. The count
is stopped while the pin is “H”.
Timer X can stop counting by setting “1” to the timer X count stop
bit in any mode.
Also, when Timer X underflows, the timer X interrupt request bit is
set to “1”.
Note on Timer X is described below;
■ Note on Timer X
(1) CNTR0 interrupt active edge selection-1
CNTR0 interrupt active edge depends on the CNTR0 active edge
switch bit.
When this bit is “0”, the CNTR0 interrupt request bit is set to “1” at
the falling edge of CNTR0 pin input signal. When this bit is “1”, the
CNTR0 interrupt request bit is set to “1” at the rising edge of
CNTR0 pin input signal.
(2) CNTR0 interrupt active edge selection-2
According to the setting value of CNTR0 active edge switch bit,
the interrupt request bit may be set to “1”.
When not requiring the interrupt occurrence synchronized with
these setting, take the following sequence.
Set the corresponding interrupt enable bit to “0” (disabled).
Set the active edge switch bit.
Set the corresponding interrupt request bit to “0” after 1 or more
instructions have been executed.
Set the corresponding interrupt enable bit to “1” (enabled).
Fig. 26 Structure of timer X mode register
Fig. 27 Timer count source set register
Timer X mode register
(TXM : address 002B16, initial value: 0016)
CNTR0 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 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
Not used (return “0” when read)
Timer X count stop bit
0 : Count start
1 : Count stop
b7
b0
P03/TXOUT output valid bit
0 : Output invalid (I/O port)
1 : Output valid (Inverted CNTR0 output)
b7
b0
Timer X count source selection bits
b1 b0
0
0 : f(XIN)/16
0
1 : f(XIN)/2
1
0 : f(XIN) (Note 1)
1
1 : Not available
Notes 1: f(XIN) can be used as timer X count source when using
a ceramic resonator or on-chip oscillator.
Do not use it at RC oscillation.
2: On-chip oscillator can be used when the on-chip oscillator
is enabled by bit 3 of CPUM.
Timer count source set register
(TCSS : address 002A16, initial value: 0016)
Timer B count source selection bits
b7 b6 b5
0
0 : f(XIN)/16
0
1 : f(XIN)/2
0
1
0 : f(XIN)/32
0
1
1 : f(XIN)/64
1
0
0 : f(XIN)/128
1
0
1 : f(XIN)/256
1
0 : Timer A underflow
1
1 : Not available
Timer A count source selection bits
b4 b3 b2
0
0 : f(XIN)/16
0
1 : f(XIN)/2
0
1
0 : f(XIN)/32
0
1
1 : f(XIN)/64
1
0
0 : f(XIN)/128
1
0
1 : f(XIN)/256
1
0 : On-chip oscillator output (Note 2)
1
1 : Not available
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| M37546G2SP#U0 | 功能描述:MCU 3/5V 8K 32-SDIP QZ-ROM RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 标准包装:250 系列:80C 核心处理器:8051 芯体尺寸:8-位 速度:16MHz 连通性:EBI/EMI，I²C，UART/USART 外围设备:POR，PWM，WDT 输入/输出数:40 程序存储器容量:- 程序存储器类型:ROMless EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4.5 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:68-LCC（J 形引线） 包装:带卷 (TR) |
| M37546G2-XXXGP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37546G2-XXXHP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37546G2-XXXSP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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