59A16U1 参数 Datasheet PDF下载

SM59A16U1

8-Bit Micro-controller

64KB with ISP Flash

& 6K+256B RAM embedded

3.2

Data Memory

The SM59A16U1 has 6K+256B on-chip SRAM, 256 Bytes of it are the same as general 8052 internal memory

structure while the expanded 6K Bytes on-chip SRAM can be accessed by external memory addressing method( by

instruction MOVX.). As shown in Fig. 3-2、Fig. 3-3 and Fig. 3-4

Fig. 3-2: (a)External memory access as read

Fig. 3-3: (b)External memory access as write

07FF

FF

FF

Higher 128 Bytes (Accessed by

indirect addressing mode only)

80

7F

SFR (Accessed by direct addressing

mode only)

80

Expanded 6K Bytes

(Accessed by direct external

addressing mode by

instruction MOVX)

Lower 128 Bytes (Accessed by direct

& indirect addressing mode )

00

0000

Fig. 3-4: RAM architecture

Specifications subject to change without notice contact your sales representatives for the most recent information.

ISSFD-M071

Ver A

SM59A16U1

04/12/2013

- 30 -