參數(shù)資料
型號(hào): HD40C4389
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(jì)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(jì)算機(jī))
文件頁數(shù): 34/162頁
文件大?。?/td> 482K
代理商: HD40C4389
HD404374/HD404384/HD404389/HD404082/HD404084 Series
34
Table 1 (2) Initial Values after MCU Reset
Item
Abbr.
Initial
value
Contents
Serial
interface
Serial mode register 1
(SMR1)
0000
See serial mode register 1 section
Serial mode register 2
(SMR2)
-0X-
See serial mode register 2 section
Serial data register
(SRU,L)
$XX
Octal counter
000
A/D
converter
A/D mode register
(AMR)
0000
See A/D mode register section
A/D data register U
(ADRU)
0111
See A/D data register section
A/D data register M
(ADRM)
1111
A/D data register L
(ADRL)
11- -
Bit
registers
Low speed on flag
(LSON)
0
See low-power mode section
Watchdog timer on flag
(WDON)
0
See timer C section
A/D start flag
(ADSF)
0
See A/D converter section
Direct transfer on flag
(DTON)
0
See low-power mode section
Gear enable flag
(GEF)
0
See system clock gear function
Others
Miscellaneous register
(MIS)
0-00
See low-power mode and input/output sections
System clock select
register
(SSR)
0000
See low-power mode and oscillator circuit sections
Module standby register 1
(MSR1)
--00
See timer section
Module standby register 2
(MSR2)
--00
See serial interface and A/D converter sections
Notes: 1. The state of registers and flags other than those listed above after an MCU reset is shown in
table 1 (3).
2. X: Indicates invalid value, - indicates that the bit does not exist.
Table 1 (3) Initial Values after MCU Reset
Item
Abbr.
After Stop Mode Clearance by
WU
0
After Other MCU Reset
Carry flag
(CA)
Retain value immediately prior to
entering stop mode
Value immediately prior to MCU reset is not
guaranteed. Must be initialized by program.
Accumulator
(A)
B register
(B)
W register
(W)
X/SPX register (X/SPX)
Y/SPY register (Y/SPY)
RAM
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