HD404449 Datasheet, PDF (15/123 Pages) Hitachi Semiconductor – HD404449 SERIES

HD404449 Series
Table 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 register
Timer/
counters,
serial
interface
Port mode register A
Port mode register B
Port mode register C
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 1A
Serial mode register 1B
Serial mode register 2A
Serial mode register 2B
Prescaler S
Prescaler W
Abbr.
(PC)
(ST)
(SP)
(IE)
Initial
Value
$0000
1
$3FF
0
Contents
Indicates program execution point from start
address of ROM area
Enables conditional branching
Stack level 0
Inhibits all interrupts
(IF)
0
Indicates there is no interrupt request
(IM)
1
Prevents (masks) interrupt requests
(PDR) All bits 1 Enables output at level 1
(DCD0– All bits 0 Turns output buffer off (to high impedance)
DCD2)
(DCR0– All bits 0
DCRC)
(PMRA) 0000
Refer to description of port mode register A
(PMRB) - 000 Refer to description of port mode register B
(PMRC) 0000
Refer to description of port mode register C
(ESR1) 0000
Disables edge detection
(ESR2) 00 - - Disables edge detection
(TMA) 0000
Refer to description of timer mode register A
(TMB1)
(TMB2)
(TMC1)
(TMC2)
(TMD1)
(TMD2)
(SM1A)
(SM1B)
(SM2A)
(SM2B)
(PSS)
(PSW)
0000
- - 00
0000
- 000
0000
0000
0000
- - 00
0000
- 000
$000
$00
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 1A
Refer to description of serial mode register 1B
Refer to description of serial mode register 2A
Refer to description of serial mode register 2B
—
—
15