HD404019R Datasheet, PDF (11/65 Pages) Renesas Technology Corp – CMOS 4-bit single-chip microcomputers

HD404019R Series
0
$000
RAM-mapped registers
31
$01F
32
Memory registers (MR)
$020
47
$02F
48
$030
Data
(928 digits)
959
960
1023
Stack
(64 digits)
$3BF
$3C0
$3FF
0
$000
1
Interrupt control bits area
$001
2
$002
3
$003
4 Port mode register
(PMR) W $004
5 Serial mode register (SMR) W $005
6 Serial data register lower (SRL) R/W $006
7 Serial data register upper (SRU) R/W $007
8 Timer mode register A (TMA) W $008
9 Timer mode register B (TMB) W $009
10
Timer B*
(TCBL/TLRL) R/W $00A
11
(TCBU/TLRU) R/W $00B
12
$00C
Not used
31
$01F
R: Read only
W: Write only
R/W: Read/write
*: Two registers are mapped on the same address.
Timer counter B lower
10
(TCBL)
R
Timer load register B
lower (TLRL)
Timer counter B upper
11
(TCBU)
R
Timer load register B
upper (TLRU)
W $00A
W $00B
Figure 2 RAM Memory Map
9