HD404889_03 Datasheet, PDF (38/197 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

HD404889/HD404899/HD404878/HD404868 Series
$040
$041
$042
$043
$044
$045
$046
$047
$048
$049
$04A
$04B
$04C
$04D
$04E
$04F
MR (0)
MR (1)
MR (2)
MR (3)
MR (4)
MR (5)
MR (6)
MR (7)
MR (8)
MR (9)
MR (10)
MR (11)
MR (12)
MR (13)
MR (14)
MR (15)
(a) Memory registers
960
1,023
Level
Level
Level
Level
Level
Level
Level
Level
Level
Level
Level
Level
Level
Level
Level
Level
16 $3C0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1 $3FF
1020
1021
1022
1023
(b) Stack area
PC13 to PC0 : Program counter
ST
: Status flag
CA
: Carry flag
Bit 3
ST
2+10
CA
2+3
Bit 2
2+13
Bit 1
2+12
Bit 0
2+11 $3FC
2+9 2+8 2+7 $3FD
2+6 2+5 2+4 $3FE
2+2 2+1 2+0 $3FF
Figure 6 Configuration of Memory Registers and Stack Area, and Stack Position
Bank register (V: $03F)
Bit
3
2
1
0
Read/Write
—
—
—
R/W
Initial value on reset
—
—
—
0
Bit name
Not Used Not Used Not Used V0
V0
Bank area selection
0
Bank 0 is selected
1
Bank 1 is selected
Note: After reset, the value in the bank register is 0, and therefore bank 0 is selected.
Applies to HD404889 and HD404899 Series.
Figure 7 Bank Register (V)
Rev.6.00, Sep.08.2003, page 38 of 197