參數(shù)資料
型號: HD40C4388
廠商: Hitachi,Ltd.
英文描述: Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計算機(jī))
中文描述: 低電壓如同在微機(jī)芯片的A / D轉(zhuǎn)換器(帶片上的A / D轉(zhuǎn)換器的低壓微計算機(jī))
文件頁數(shù): 68/162頁
文件大?。?/td> 482K
代理商: HD40C4388
HD404374/HD404384/HD404389/HD404082/HD404084 Series
68
Prescalers
The MCU has the following prescalers, S and W (HD404374 Series).
The operating conditions for each prescaler are shown in table 24, and the output supply destinations in
figure 31.
Timer A to C input clocks other than external events, and serial transfer clocks other than external clocks
are selected from the prescaler outputs in accordance with the respective mode register.
Prescaler Operation
Prescaler S (PSS):
Prescaler S is an 11-bit counter that has the system clock as input. When the MCU is reset, prescaler S is
reset to $000, then divides the system clock. Prescaler S operation is stopped by a reset by the MCU, and
in stop mode and watch mode
*1
. It does not stop in any other modes.
Prescaler W (PSW) (HD404374 Series):
Prescaler W is a counter that has a clock divided from the X1 input (32 kHz crystal oscillation) as input.
When the MCU is reset, prescaler W is reset to $00, then divides the input clock. Prescaler W can also be
reset by software.
Table 24
Prescaler Operating Conditions
Prescaler
Input Clock
Reset Conditions
Stop Conditions
Prescaler S
System clock in active and
standby modes, subsystem
clock in subactive mode*
1
MCU reset, stop mode
clearance
MCU reset, stop mode,
watch mode*
1
Prescaler W
Clock obtained by division-
by-8 of 32.768 kHz
oscillation by subsystem
clock oscillator
Applies to HD404374 Series
If bits TMA3 to TMA1 in timer mode register A (TMA) are all set to 1, PSW is cleared to $00.
MCU reset, software*
2
MCU reset, stop mode
Notes: 1
2
相關(guān)PDF資料
PDF描述
HD40C4389 Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計算機(jī))
HD404394 4-bit HMCS400-series microcomputer(4位單片微計算機(jī))
HD4074344S 4-bit HMCS400-series microcomputer(4位單片微計算機(jī))
HD4074394S 4-bit HMCS400-series microcomputer(4位單片微計算機(jī))
HD40C4341R 4-bit HMCS400-series microcomputer(4位單片微計算機(jī))
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD40L4818H 制造商:Renesas Electronics Corporation 功能描述:
HD40-M 制造商:Tamura Corporation of America 功能描述:
HD40WS/EHOOD/PLUG 制造商:Lapp 功能描述:HD 40 way side entry assembled plug 制造商:Lapp Group 功能描述:HD 40 way side entry assembled plug
HD-41494-1 功能描述:環(huán)形MIL規(guī)格工具、五金與附件 RoHS:否 制造商:Amphenol Industrial MIL 類型:MIL-DTL-5015 系列:97 產(chǎn)品類型:Dummy Receptacles 用于:97 Series Plugs
HD4-15530/883 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Encoder/Decoder