SM89516 Просмотр технического описания (PDF) - SyncMOS Technologies,Inc
Номер в каталоге
Компоненты Описание
производитель
SM89516 Datasheet PDF : 19 Pages
| |||
SyncMOS Technologies Inc.
May 2001
SM89516
Data Memory
The SM89516 has 1K bytes on-chip RAM, 256 bytes of it are the same as general 8052 internal memory
structure while the expanded 768 bytes on-chip RAM can be accessed by external memory addressing method.
(by instruction MOVX)
02FF
FF Higher 128 bytes (Access by
SFR (Accessed by direct
80 indirect addressing mode only)
7F Lower 128 bytes (Accessed by
addressing mode only)
00 direct & indirect addressing mode)
Expanded 768 bytes (Accessed
by direct external addressing
mode, by instruction MOVX)
FF
(OME = 1)
80
0000
Data Memory - Lower 128 byte
Data memory $00 to $FF is the same as 8052
The address $00 to $7F can be accessed by direct and indirect addressing modes.
Address $00 to $1F is register area.
Address $20 to $2F is memory bit area.
Address $30 to $7F is for general memory area.
Data memory - Higher 128 byte
The address $80 to $FF can be accessed by indirect addressing mode only.
Addressing $80 to $FF is data area.
Data Memory - Expanded 768 bytes
From external address $0000 to $02FF is the on-chip expanded RAM area, total 768 bytes. This area can be
accessed by external direct addressing mode only (by instruction MOVX).
Internal RAM Control Register (RCON, $85)
Read :
Write :
Reset value :
bit-7
Unused
*
Unused
*
Unused
*
Unused
*
Unused
*
Unused
*
RAMS1
0
bit-0
RAMS0
0
Specifications subject to change without notice,contact your sales representatives for the most recent information.
6/19
Ver 1.3 PID 89516 05/01
Share Link: 