HD404618 Datasheet, PDF (18/91 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404618 Series
Table 1 Initial Values After MCU Reset (cont)
Item
Timer/
counters, ^serial
interface
LCD
DTMF generator
Bit registers
Miscellaneous
register
Timer counter B
Abbr.
(TCB)
Initial Value Contents
$00
—
Timer counter C
(TCC) $00
Timer load register B (TLR) $00
Timer load register C (TCR) $00
Octal counter
000
LCD control register (LCR) 000
LCD mode register
(LMR) 0000
Tone generator control (TGC)
register
Tone generator mode (TGM)
register
Low speed on flag
(LSON)
000
0000
0
Watchdog timer on flag (WDON) 0
Tone generator speed (TGSP) 0
flag
Direct transfer on flag (DTON) 0
(MIS) 000
—
—
—
—
Refer to description of LCD
control register
Refer to description of LCD duty
cycle/clock control
Refer to description of tone
generator control register
Refer to description of generator
mode register
Refer to description of operating
modes
Refer to description of timer C
Refer to description of DTMF
generation circuit
Refer to description of operating
modes
—
Item
Carry flag
Accumulator
B register
W register
X/SPX register
Y/SPY register
Serial data register
RAM
Abbr.
(CA)
(A)
(B)
(W)
(X/SPX)
(Y/SPY)
(SR)
Status after Cancellation of
Stop Mode by MCU Reset
Pre-MCU-reset values are not
guaranteed; values must be
initialized by program
Status after Cancellation of All
Other Modes by MCU Reset
Pre-MCU-reset values are not
guaranteed; values must be
initialized by program
Pre-MCU-reset (pre-STOP-
instruction) values are retained
16