HD404668 データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HD404668

Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit

Hitachi -> Renesas Electronics 

HD404669 Series

Memory Register (MR) Area ($040–$04F): Consisting of 16 addresses, this area (MR0–MR15) can be

accessed by register-register instructions (LAMR and XMRA). The structure is shown in figure 6.

RAM address

$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)

$3C0

$3FF

Level 16

Level 15

Level 14

Level 13

Level 12

Level 11

Level 10

Level 9

Level 8

Level 7

Level 6

Level 5

Level 4

Level 3

Level 2

Level 1

(a) Memory registers

(b) Stack area

$3FC

$3FD

$3FE

$3FF

Bit 3

ST

PC10

CA

PC3

PC13 to PC0 : Program counter

ST

: Status flag

CA

: Carry flag

Bit 2

PC13

PC9

PC6

PC2

Bit 1

PC12

PC8

PC5

PC1

Bit 0

PC11

PC7

PC4

PC0

Figure 6 Configuration of Memory Registers and Stack Area, and Stack Position

16

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