SM59R16A2 Datasheet, PDF (21/67 Pages) SyncMOS Technologies,Inc – 8-Bit Micro-controller

SM59R16A2/SM59R08A2
8-Bit Micro-controller
64KB/32KB ISP Flash & 2KB RAM embedded
4.6 Data Pointer 1
The dual data pointer accelerates the moving of block data. The standard DPTR is a 16-bit register
that is used to address external memory or peripherals. In the SM59R16A2/SM59R08A2, the
standard data pointer is called DPTR, the second data pointer is called DPTR1. The data pointer
select bit chooses the active pointer. The data pointer select bit is located in the LSB of DPS
register (DPS.0).
The user switches the pointer between PDTR and DPTR1 by toggling the LSB of DPS register. All
DPTR-related instructions use the currently selected DPTR for any activity.
Mnemonic: DPL1
7
6
5
4
3
DPL1 [7:0]
Address: 84h
2
1
0 Reset
00h
DPL1[7:0]: Data pointer Low 1
Mnemonic: DPH1
Address: 85h
7
6
5
4
3
2
1
0 Reset
DPH1 [7:0]
00h
DPH1[7:0]: Data pointer High 1
Mnemonic: DPS
Address: 92h
7
6
5
4
3
2
1
0 Reset
-
-
-
-
-
-
-
DPS.0 00h
DPS.0: Data Pointer selects register.
DPS.0 = 1 is selected DPTR1.
4.7 Interface control register
Mnemonic: IFCON
Address: 8Fh
7
6
5
4
3
2
1
0 Reset
ITS
-
-
-
ALEC[1:0]
DMEN -
00h
ITS: Instruction timing select.
ITS = 0, 2T instruction mode.
ITS = 1, 1T instruction mode.
ALEC[1:0]: ALE output control register.
ALEC[1:0] ALE Output
00
Always output
01
No ALE output
10
Only Read or Write have ALE output
11
reserved
DMEN: Internal 2K SRAM disable.(default is enable)
DMEN = 0, Enable internal 2K RAM.
DMEN = 1, Disable internal 2K RAM.
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M034
21
Ver.B SM59R16A2/SM59R08A2 06/2009