HD404654 Datasheet, PDF (16/109 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404654 Series
Item
Abbr. Initial Value Contents
Timer/counters, Timer counter C
(TCC) $00
—
serial interface
Timer counter D
(TCD) $00
—
Timer write register C (TWCU, $X0
—
TWCL)
Timer write register D (TWDU, $X0
—
TWDL)
Octal counter
000
—
Comparator
Compare enable
register
(CER) 0 - 00
Refer to description of voltage
comparator
Bit register
Watchdog timer on flag (WDON) 0
Refer to description of timer C
Input capture status (ICSF) 0
flag
Refer to description of timer D
Input capture error flag (ICEF) 0
Refer to description of timer D
Others
Miscellaneous register (MIS) 00 - -
Refer to description of operating
modes, and oscillator circuit
System clock select
register 1 bits 1, 0
(SSR11, 00
SSR10)
Refer to description of operating
modes, and oscillator circuit
System clock select
register 2
(SSR2) - 0 - -
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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