HD404639R Datasheet, PDF (17/135 Pages) Renesas Technology Corp – 4-Bit Single-Chip Microcomputer

HD404639R Series
Item
Abbr.
Initial
Value Contents
Timer/
Serial mode register 1A (SM1A)
counters,
0000 Refer to description of serial mode
register 1A
serial
Serial mode register 1B (SM1B)
interface
- - X0 Refer to description of serial mode
register 1B
Serial mode register 2A (SM2A)
0000 Refer to description of serial mode
register 2A
Serial mode register 2B (SM2B)
- 0X0 Refer to description of serial mode
register 2B
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, TWBL) $X0 —
Timer write register C (TWCU, TWCL) $X0 —
Timer write register D (TWDU, TWDL) $X0 —
Octal counter
000 —
Comparator Compare control register (CCR)
0000 Refer to description of voltage comparator
Compare enable register (CER)
0000 Refer to description of voltage comparator
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
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 2–0
(SSR12–
SSR10)
000 Refer to description of operating modes,
and oscillator circuit
System clock select
register 2
(SSR2)
0000
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.
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