HD404889_03 Datasheet, PDF (42/197 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

HD404889/HD404899/HD404878/HD404868 Series
Table 1 (1) (cont) Initial Values after MCU Reset
Item
Abbr.
Initial
value Contents
Serial
interface
Serial mode register 1
Serial mode register 2
(SMR1)
(SMR2)
0000
-0X-
See serial mode register 1 section
See serial mode register 2 section
Serial data register
(SRU,L) $XX
Octal counter
000
A/D
converter
A/D mode register
A/D data register
(HD404889 Series)
(AMR)
(ADRU,L)
0000
$7F
See A/D mode register section
See A/D data register section
A/D data register
(HD404899 Series)
(ADRU,M,L) $1FF See A/D data register section
LCD
LCD control register
(LCR)
0000 See LCD control register section
LCD mode register
(LMR)
0000 See LCD duty/clock control register section
Bit
Low speed on flag
(LSON)
0
registers _{Watchdog timer on flag (WDON)}
0
See low-power mode section
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
Input capture status flag (ICSF)
0
See timer D section
Input capture error flag (ICEF)
0
See timer D 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)
-000 See timer section
Module standby register 2 (MSR2)
--00
See serial interface and A/D converter sections
Buzzer mode register
(BMR)
0000 See Buzzer mode register section
Notes: 1. The state of registers and flags other than those listed above after an MCU reset is shown in
table 1 (2).
2. X: Indicates invalid value, - indicates that the bit does not exist.
Table 1 (2) Initial Values after MCU Reset
Item
Abbr.
Carry flag
(CA)
Accumulator (A)
B register
(B)
W register
(W)
X/SPX register (X/SPX)
Y/SPY register (Y/SPY)
RAM
After Stop Mode Clearance by WU₀ to
WU₃ Input
Retain value immediately prior to
entering stop mode
After Other MCU Reset
Value immediately prior to MCU reset is not
guaranteed. Must be initialized by program.
Rev.6.00, Sep.08.2003, page 42 of 197