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參數(shù)資料
| 型號： | M37548G2FP |
| 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)： | 51/86頁 |
| 文件大?。?/td> | 1437K |
| 代理商： | M37548G2FP |
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Rev.2.02
Mar 31, 2009
Page 53 of 81
REJ03B0210-0202
7548 Group
Fig 69. State transition of oscillation stop detection circuit
Notes on switch of clock
(1) Executing the state transition after stabilizing XIN oscillation.
(2) MCU cannot be returned by on-chip oscillator and its operation is stopped since internal reset does not
occur at oscillation stop detected in state 2'a. Accordingly, do not execute the transition to state 2'a.
(3) STP instruction cannot be used when oscillation stop detection circuit is in active.
(4) The same applies when the high-speed on-chip oscillator is set as
φSOURCE. Make sure that the low-speed
on-chip oscillator should also oscillate. When a reset occurs, the high-speed on-chip oscillator stops.
Reset state 1
Oscillation stop detection reset disabled
When oscillation stop is detected;
CLKSTP2 is set to “1”.
Internal RESET does not occur.
= 02
= 12
CLKSTP0 = 02
(CLKSTP2 is set to “0”.)
CLKSTP 0 = 12
(Note 1)
Oscillation stop is detected
(internal reset)
Reset state 2
External reset (RESET=“L”)
Power-on reset
Low voltage detection reset
Watchdog timer reset
Reset by STP instruction function
Return from oscillation stop detection reset
CLKSTP2 is set to “1”.
So, return from oscillation stop reset can be
confirmed.
CLKSTP1= 02
CLKSTP1 = 02
(CLKSTP2 is
set to “0”.)
CLKM54 = 102
CLKM54 = 002
(Note 1)
Prohibitive state
MCU stops when oscillation stops
occurs.
State 3'a
State 2'b
State 3'b
State 3'c
Oscillation stop detection reset enabled
When oscillation stop is detected;
CLKSTP2 is set to “1”.
Internal RESET occurs.
Oscillation stop detection reset enabled
When oscillation stop is detected;
CLKSTP2 is set to “1”.
Internal RESET occurs.
Reset
released
CLKM54 = 102
CLKM54 = 002
(Note 1)
CLKM54=102
CLKM54=002
(Note 1)
State 3
XIN oscillation
: enabled
Low-speed on-chip oscillator : enabled
State 3'
XIN oscillation
: enabled
Low-speed on-chip oscillator : enabled
XIN
: enabled
High-speed on-chip oscillator : stop
Low-speed on-chip oscillator : enabled
CLKSTP1
CLKSTP1 = 12
State 2'
CLKSTP1= 12
XIN
: enabled
High-speed on-chip oscillator : stop
Low-speed on-chip oscillator : enabled
Reset
released
XIN oscillation
: enabled
Low-speed on-chip oscillator : enabled
XIN oscillation
: enabled
Low-speed on-chip oscillator : enabled
State 2
(Note 2)
φSOURCE: XIN
φSOURCE: Low-speed on-chip oscillator (Note 4)
Oscillation stop detection
circuit is in active. (Note 3)
State 2'a (Note 2)
Oscillation stop detection reset disabled
When oscillation stop is detected;
CLKSTP2 is set to "1".
Internal RESET does not occur.
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| 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 程序存儲器容量:96KB（96K x 8） 程序存儲器類型: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 |
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