SM89S16R1_06 Datasheet, PDF (16/29 Pages) SyncMOS Technologies,Inc – 8-Bits Micro-controller With 64KB Flash ROM & 1KB RAM & RTC & ADC & PWM & PDWU embedded

SyncMOS Technologies International, Inc.
SM89S16R1
8-Bits Micro-controller
With 64KB Flash ROM & 1KB RAM & RTC & ADC & PWM & PDWU embedded
A.) Without MOVX
One cycle
One cycle
S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2
ALE
/PSEN
/RD
P2
PCH OUT
PCH OUT
PCH OUT
PCH OUT
P0
PCL
OUT
INST.
IN
PCL
OUT
INST.
IN
PCL
OUT
INST.
IN
PCL
OUT
INST.
IN
PCL
OUT
A.) With MOVX
1’st cycle
2’nd cycle
S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2
ALE
/PSEN
/RD
P2
PCH OUT
P2 or DPH out
PCH OUT
P0
PCL
OUT
INST.
IN
Addr.
OUT
Data.
IN
PCL
OUT
INST.
IN
PCL
OUT
Figure 14: Bus cycle in external program memory mode
Instruction Set
The SM89S16R1 uses the powerful instruction set of 80C51. It consists of 49 single-byte, 42 two-byte, and 15 three-
byte instructions. Among them 63 instruction are executed in 1 machine-cycle, 46 instructions in 2 machine-cycles,
and the multiply, 2 instructions in 4 machine-cycles.
A summary of the instruction set is given in Table 3.
Specifications subject to change without notice contact your sales representatives for the most recent information.
Ver 2.1 SM89S16R1 08/2006
16