HD404629R Datasheet, PDF (21/157 Pages) Renesas Technology Corp – AS Microcomputer Incorporating a DTMF Generator Circuit

Table 1 Initial Values After MCU Reset
Item
Program
counter
Abbr.
(PC)
Status flag
Stack pointer
Interrupt
flags/mask
I/O
Timer/
counters,
serial
interface
Interrupt enable flag
Interrupt request flag
(ST)
(SP)
(IE)
(IF)
Interrupt mask
Port data register
Data control register
Port mode register A
Port mode register B
Port mode register C
bits 3, 1, 0
Detection edge select
register 1
Detection edge select
register 2
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
Serial mode register A
Serial mode register B
Prescaler S
Prescaler W
Timer counter A
Timer counter B
Timer counter C
Timer counter D
(IM)
(PDR)
(DCD0,
DCD1)
(DCD2)
(DCR0,
–DCR7)
(PMRA)
(PMRB)
(PMRC3,
PMRC1,
PMRC0)
(ESR1)
(ESR2)
(TMA)
(TMB1)
(TMB2)
(TMC1)
(TMC2)
(TMD1)
(TMD2)
(SMRA)
(SMRB)
(PSS)
(PSW)
(TCA)
(TCB)
(TCC)
(TCD)
Initial
Value
$0000
1
$3FF
0
0
1
All bits 1
All bits 0
- - 00
All bits 0
- - 00
0000
000
0000
0000
0000
0000
- - 00
0000
- 000
0000
0000
0000
- - X0
$000
$00
$00
$00
$00
$00
HD404629R Series
Contents
Indicates program execution point from start
address of ROM area
Enables conditional branching
Stack level 0
Inhibits all interrupts
Indicates there is no interrupt request
Prevents (masks) interrupt requests
Enables output at level 1
Turns output buffer off (to high impedance)
Refer to description of port mode register A
Refer to description of port mode register B
Refer to description of port mode register C
Disables edge detection
Disables edge detection
Refer to description of timer mode register A
Refer to description of timer mode register B1
Refer to description of timer mode register B2
Refer to description of timer mode register C1
Refer to description of timer mode register C2
Refer to description of timer mode register D1
Refer to description of timer mode register D2
Refer to description of serial mode register A
Refer to description of serial mode register B
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