HD404849 Series
17
Item
Abbr.
Initial
Value
Contents
Timer/
Serial mode register A
(SMRA)
0000
Refer to description of serial mode register A
counters,
Serial mode register B
(SMRB)
- - X0
Refer to description of serial mode register B
serial
Prescaler S
(PSS)
$000
—
interface
Prescaler W
(PSW)
$00
—
Timer counter A
(TCA)
$00
—
Timer counter B
(TCB)
$00
—
Timer counter C
(TCC)
$00
—
Timer counter D
(TCD)
$00
—
Timer write register B
(TWBU,
TWBL)
$X0
—
Timer write register C
(TWCU,
TWCL)
$X0
—
Timer write register D
(TWDU,
TWDL)
$X0
—
Octal counter
000
—
A/D
A/D mode register
(AMR)
0000
Refer to description of A/D mode register
A/D data register
(ADRU,
ADRL)
$80
Refer to description of A/D mode register
LCD
LCD control register
(LCR)
0000
Refer to description of LCD control register
LCD mode register
(LMR)
0000
Refer to description of LCD duty-cycle/clock
control register
LCD output register 3
(LOR3)
- 00 -
Sets R-port/LCD segment pins to R port
mode
Bit registers
Low speed on flag
(LSON)
0
Refer to description of operati ng modes
Watchdog timer on flag (WDON)
0
Refer to description of timer C
A/D start flag
(ADSF)
0
Refer to description of A/D converter
A/D current off flag
(IAOF)
0
Direct transfer on flag
(DTON)
0
Refer to description of operati ng modes
Input capture status
flag
(ICSF)
0
Refer to description of timer D
Input capture error flag (ICEF)
0
Refer to description of timer D
Others
Miscellaneous register
(MIS)
0000
Refer to description of operati ng modes, I/O,
and serial interface
System clock select
register bits 2, 1
(SSR2,
SSR1)
00 -
Refer to description of operati ng modes and
oscillation circuits
Bank register
(V)
- - - 0
Refer to description of RAM memory map
Notes: 1. The statuses of other registers and flags after MCU reset are shown in the following table.
2. X indicates invalid value. – indicates that the bit does not exist.