HD404669 Datasheet, PDF (13/142 Pages) Hitachi Semiconductor – Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

HD404669 Series
RAM address
Bit 3
Bit 2
Bit 1
Bit 0
$000
IM0
(INT₀ interrupt
mask)
IF0
(INT₀ interrupt
request flag)
RSP
(Reset stack
pointer)
IE
(Interrupt enable
flag)
IMTA
IFTA
$001 _{(Timer A interrupt (Timer A interrupt}
mask)
request flag)
IM1
(INT₁ interrupt
mask)
IF1
(INT₁ interrupt
request flag)
IMTC
IFTC
$002 (Timer C interrupt (Timer C interrupt
mask)
request flag)
Not used
Not used
IMS1
IFS1
IMTD
IFTD
$003 ^{(Serial 1 interrupt (Serial 1 interrupt (Timer D interrupt (Timer D interrupt}
mask)
request flag)
mask)
request flag)
Interrupt control bits area
RAM address
Bit 3
Bit 2
Bit 1
Bit 0
$020
DTON
(DTON flag)
Not used
WDON
(Watchdog on flag)
LSON
(Low speed
on flag)
$021
RAME
(RAM enable flag)
Not used
ICEF
(Input capture
error flag)
ICSF
(Input capture
status flag)
$022
IM3
(INT₃ interrupt
mask)
IF3
(INT₃ interrupt
request flag)
IM2
(INT₂ interrupt
mask)
IF2
(INT₂ interrupt
request flag)
$023
Not used
Not used
IM4
(INT₄ interrupt
mask)
IF4
(INT₄ interrupt
request flag)
Register flag area
IF : Interrupt Request Flag
IM : Interrupt Mask
IE : Interrupt Enable Flag
SP : Stack Pointer
Figure 3 Configuration of Interrupt Control Bits and Register Flag Areas
13