HD404654 Datasheet, PDF (17/109 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404654 Series
Item
Abbr.
Status After
Cancellation of Stop
Mode by STOPC Input
Status After
Cancellation of Stop
Mode by MCU Reset
Status After all
Other Types of
Reset
Carry flag
(CA)
Pre-stop-mode values are not guaranteed; values Pre-MCU-reset values
must be initialized by program
are not guaranteed;
values must be
initialized by program
Accumulator
(A)
B register
(B)
W register
(W)
X/SPX register (X/SPX)
Y/SPY register (Y/SPY)
Serial data register (SRL, SRU)
RAM
Pre-stop-mode values are retained
RAM enable flag (RAME) 1
0
0
Port mode register (PMRC12) Pre-stop-mode values 0
0
1 bit 2
are retained
System clock
(SSR13)
select register 1 bit
3
Table 2 Vector Addresses and Interrupt Priorities
Reset/Interrupt
Priority
RESET, STOPC*
—
INT₀
1
INT₁
2
Timer A
3
Not used
4
Timer C
5
Timer D
6
Serial 1
7
Note: * The STOPC interrupt request is valid only in stop mode.
Vector Address
$0000
$0002
$0004
$0006
$0008
$000A
$000C
$000E
17