SM59R16A5/SM59R09A5/SM59R05A5
8-Bit Micro-controller
64KB/36KB/20KB with ISP Flash
& 2KB RAM embedded
4.6. Data Pointer 1
The Dual Data Pointer accelerates the moves of data block. The standard DPTR is a 16-bit register that is used to
address external memory or peripherals. In the SM59R16A5 core 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 LSB of AUX register (DPS).
The user switches between pointers by toggling the LSB of AUX register. All DPTR-related instructions use the currently
selected DPTR for any activity.
Mnemonic: DPL1
Address: 84h
7
6
5
4
3
2
2
1
1
0
Reset
00h
DPL1 [7:0]
DPL1[7:0]: Data pointer Low 1
Mnemonic: DPH1
Address: 85h
0
7
6
5
4
3
Reset
00h
DPH1 [7:0]
DPH1[7:0]: Data pointer High 1
Mnemonic: AUX
Address: 91h
7
6
-
5
4
3
2
1
0
DPS
Reset
00H
BRGS
P4SPI
P4UR1
P4IIC
P0KBI
P2PWM
DPS: Data Pointer selects register.
DPS = 1 is selected DPTR1.
4.7. Internal RAM control register
SM59R16A5 has 2K byte on-chip expanded RAM which can be accessed by external memory addressing method only
(By instruction MOVX). The address space of instruction MOVX @Ri, i= 0, 1 is determined by RCON [7:0] of RCON. The
default setting of RCON [7:0] is 00h (page0).
Mnemonic: RCON
Address: 86h
7
6
5
4
3
2
1
0
Reset
RCON[7:0]
00H
4.8. Interface control register
Mnemonic: IFCON
Address: 8Fh
7
ITS
6
5
-
4
-
3
2
1
0
Reset
00h
CDPR
ALEC[1:0]
EMEN
ISPE
ITS: Instruction timing select. (default is 2T)
ITS = 0, 2T instruction mode.
ITS = 1, 1T instruction mode.
CDPR: code protect (Read Only)
ALEC[1:0]: ALE output control register.
ALEC[1:0]
ALE Output
00
01
10
11
Always output
No ALE output
Only Read or Write have ALE output
reserved
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M047 28 Ver.G SM59R16A5 01/2014
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
