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SM89516AC25 Fiches technique(PDF) 7 Page - SyncMOS Technologies,Inc

No de pièce SM89516AC25
Description  8-Bits Micro-controller With 64KB flash & 1KB RAM embedded
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Fabricant  SYNCMOS [SyncMOS Technologies,Inc]
Site Internet  http://www.syncmos.com.tw
Logo SYNCMOS - SyncMOS Technologies,Inc

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SyncMOS Technologies International, Inc.
SM89516A
8-Bits Micro-controller
With 64KB flash & 1KB RAM embedded
Specifications subject to change without notice contact your sales representatives for the most recent information.
Ver 2.1 SM89516A 08/2006
7
Internal RAM Control Register (RCON, $85)
bit-7
bit-0
Unused
Unused
Unused
Unused
Unused
Unused
RAMS1
RAMS0
Read / Write:
-
-
-
-
-
-
R/W
R/W
Reset value:
*
*
*
*
*
*
0
0
SM89516A has 768 byte on-chip RAM which can be accessed by external memory addressing method only. (By
instruction MOVX). The address space of instruction MOVX @Rn is determined by bit 1 and bit 0 (RAMS1, RAMS0)
of RCON. The default setting of RAMS1, RAMS0 bits is 00 (page0).
RAMS1
RAMS0
MOVX @Ri i=0,1 mapping to expended RAM address
0
0
$0000 ~ $00FF
0
1
$0100 ~ $01FF
1
0
$0200 ~ $02FF
The port 0, port2, port3.6 and port3.7 can be used as general purpose I/O pin while port0 is open-drain structure.
System Control Register (SCONF, $BF)
bit-7
bit-0
WDR
Unused
Unused
Unused
Unused
Unused
OME
ALEI
Read / Write:
R/W
-
-
-
-
-
R/W
R/W
Reset value:
0
*
*
*
*
*
0
0
WDR : Watch Dog Timer Reset. When system reset by Watch Dog Timer overflow. WDR will be set to 1, The bit 7
(WDR) of SCONF is Watch Dog Timer Reset bit. It will be set to 1 when reset signal generated by WDT
overflow. User should check WDR bit whenever un-predicted reset happened.
OME : 768 bytes on-chip RAM enable bit. The bit 1 (OME) of SCONF can enable or disable the on-chip expanded
768 byte RAM. The default setting of OME bit is 0 (disable).
ALEI : ALE output inhibit bit, to reduce EMI. Setting bit 0 (ALEI) of SCONF can inhibit the clock signal in Fosc/6Hz
output to the ALE pin.


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