HD404459 Datasheet, PDF (18/122 Pages) Renesas Technology Corp – 4-bit HMCS400-series microcomputers

HD404459 Series
Item
Abbr.
Initial
Value
Contents
Timers/
counters,
serial
interface
Prescaler S
(PSS) $000
—
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, $X0
—
TWBL)
Timer write register C (TWCU, $X0
—
TWCL)
Timer write register D (TWDU, $X0
—
TWDL)
Octal counter
000
—
I/O
Wakeup set register
(WSR) 0000
—
Voltage Comparator enable
comparator register
(CER) 0000
—
Comparator control
register
(CCR) 0000
—
Bit register Low speed on flag
(LSON) 0
Refer to description of operating modes
Watchdog timer on flag (WDON) 0
Refer to description of timer C
Comparator start flag (CMSF) 0
Refer to description of voltage comparator
Direct transfer on flag (DTON) 0
Refer to description of operating 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 operating modes, and
oscillator circuit
System clock select
register 1 bits 2, 1
(SSR12– 00
SSR11)
Refer to description of operating modes, and
oscillator circuit
System clock select
register 2
(SSR2) - - 00 Switches OSC division ratio
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.
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