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参数资料
| 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： | 69/105页 |
| 文件大小： | 1105K |
| 代理商： | M37546G2SP |
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REJ03B0160-0122 Rev.1.22 Mar 13, 2009
page 64 of 100
7546 Group
Fig. 83 Structure of MISRG
● Oscillation stop detection circuit
The oscillation stop detection circuit is used for reset occurrence
when a ceramic resonator or RC oscillation circuit stops by dis-
connection. To use this circuit, set an on-chip oscillator to be in
active.
The oscillation stop detection circuit is in active to set “1” to the
ceramic or RC oscillation stop detection function active bit. When
the oscillation stop detection circuit is in active, ceramic or RC os-
cillation is watched by the on-chip oscillator. When stop of ceramic
or RC oscillation is detected, the oscillation stop detection status
bit is set to “1”. While “1” is set to the oscillation stop reset bit, in-
ternal reset occurs when oscillation stop is detected.
The external reset and the oscillation stop reset can be discrimi-
nated by reading the oscillation stop detection status bit.
The oscillation stop detection status bit retains “1”, not initialized,
when the oscillation stop reset occurs. The oscillation stop detec-
tion status bit is initialized to “0” when the external reset occurs.
Accordingly, reset by oscillation stop can be confirmed by using
this flag.
■ Notes on Oscillation Stop Detection Circuit
Do not execute the transition to “state 2’a” shown in Fig. 84
because in this “state 2’a”, MCU is stopped without reset even
when XIN oscillation is stopped.
Ceramic or RC oscillation stop detection function active bit is not
cleared by the oscillation stop internal reset. Accordingly, the
oscillation stop detection circuit is in active when system is re-
leased from internal reset cause of oscillation stop detection.
Oscillation stop detection status bit is initialized by the following
operation.
(1) External reset
(2) Write “0” data to the ceramic or RC oscillation stop detection
function active bit.
The oscillation stop detection circuit is not included in the emu-
lator MCU “M37542RSS”.
MISRG(address 003816, initial value: 0016)
b7
b0
Oscillation stabilization time set bit after
release of the STP instruction
0: Set “0116” in timer1, and “FF16”
in prescaler 1 automatically
1: Not set automatically
Reserved bits
(Do not write “1” to these bits)
Not used (return “0” when read)
Oscillation stop detection status bit
0: Oscillation stop not detected
1: Oscillation stop detected
Oscillation stop reset bit
0: Oscillation stop reset disabled
1: Oscillation stop reset enabled
Ceramic or RC oscillation stop
detection function active bit
0: Detection function inactive
1: Detection function active
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| M37546G4GP | 功能描述:MCU 2/5V 16K 32-LQFP 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) |
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