参数资料
型号: M37225ECSP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 8.1 MHz, MICROCONTROLLER, PDIP42
封装: 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42
文件页数: 114/127页
文件大小: 1897K
代理商: M37225ECSP
86
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
M37225M6/M8/MA/MC–XXXSP
M37225ECSP
MITSUBISHI MICROCOMPUTERS
Rev. 1.0
8.12. RESET CIRCUIT
When the oscillation of a quartz-crystal oscillator or a ceramic reso-
nator is stable and the power source voltage is 5 V ± 10 %, hold the
RESET pin at LOW for 2
s or more, then return is to HIGH. Then, as
shown in Figure 8.12.2, reset is released and the program starts form
the address formed by using the content of address FFFF16 as the
high-order address and the content of the address FFFE16 as the
low-order address. The internal state of microcomputer at reset are
shown in Figures 8.2.3 to 8.2.6.
An example of the reset circuit is shown in Figure 8.12.1.
The reset input voltage must be kept 0.9 V or less until the power
source voltage surpasses 4.5 V.
Fig.8.12.2 Reset Sequence
Fig.8.12.1 Example of Reset Circuit
Power source voltage 0 V
Reset input voltage 0 V
4.5 V
0.9 V
Poweron
Vcc
RESET
Vss
Microcomputer
1
5
4
3
0.1
F
M51953AL
XIN
φ
RESET
Internal RESET
SYNC
Address
Data
32768 count of X IN
clock cycle (See note 3)
Reset address from the vector table
?
01, S
01, S-1 01, S-2
FFFE
FFFF
ADH,
ADL
?
ADL
ADH
Notes 1 : f(XIN) and f(
φ) are in the relation : f(XIN) = 2f (φ).
2 : A question mark (?) indicates an undefined state that
depends on the previous state.
3 : Immediately after a reset, timer 3 and timer 4 are
connected by hardware. At this time, “FF 16” is set
in timer 3 and “0716” is set to timer 4. Timer 3 counts down
with f(XIN)/16, and reset state is released by the timer 4
overflow signal.
相关PDF资料
PDF描述
M37270EF-XXXSP 8-BIT, OTPROM, 8.1 MHz, MICROCONTROLLER, PDIP64
M37270EFSP 8-BIT, OTPROM, 8.1 MHz, MICROCONTROLLER, PDIP64
M37270MF-XXXSP 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP64
M37271MF-XXXSP 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP52
M37271EF-XXXSP 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP52
相关代理商/技术参数
参数描述
M37225M6 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37225M8 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37225MA 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M372429100 制造商:ITW Switches 功能描述:IN-RUSH
M372429200 制造商:ITW Switches 功能描述:IN-RUSH