E202075_HD404889 Datasheet, PDF (40/202 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

HD404889/HD404899/HD404878/HD404868 Series
Table 1 (1) Initial Values after MCU Reset
Item
Program counter
Status flag
Stack pointer
Interrupt Interrupt enable flag
flags/ mask Interrupt request flag
Interrupt mask
I/O
Port data register
Data control registers
Data control registers
Timers
Port mode register 0
Port mode register 1
Port mode register 2
Port mode register 3
Port mode register 4
Edge detection select
register
Timer mode register A
Timer mode register B1
Timer mode register B2
Timer mode register C1
Timer mode register C2
Timer mode register D1
Timer mode register D2
Prescaler S
Prescaler W
Timer/counter A
Timer/counter B
Timer/counter C
Timer/counter D
Timer write register B
Timer write register C
Timer write register D
Abbr.
Initial
value Contents
(PC)
$0000 Program executed from ROM start address
(ST)
1
Branching by conditional branch instruction enabled
(SP)
$3FF Stack level is 0
(IE)
0
All interrupts disabled
(IF)
0
No interrupt requests
(IM)
1
Interrupt requests masked
(PDR)
All bits 1 "1" level output possible
(DCD0 to 2) All bits 0 Output buffer off (high impedance)
(DCR0 to 7, All bits 0
DCR80,
DCR81)
(PMR0)
--00
See port mode register 0 section
(PMR1)
0000 See port mode register 1 section
(PMR2)
0000 See port mode register 2 section
(PMR3)
0000 See port mode register 3 section
(PMR4)
0000 See port mode register 4 section
(ESR)
--00
See edge detection select register section
(TMA)
(TMB1)
(TMB2)
(TMC1)
(TMC2)
(TMD1)
(TMD2)
(PSS)
(PSW)
(TCA)
(TCB)
(TCC)
(TCD)
(TWBU,L)
(TWCU,L)
(TWDU,L)
0000
0000
-000
0000
-0--
0000
-000
$000
$00
$00
$00
$00
$00
$X0
$X0
$X0
See timer mode register A section
See timer mode register B1 section
See timer mode register B2 section
See timer mode register C1 section
See timer mode register C2 section
See timer mode register D1 section
See timer mode register D2 section
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