SyncMOS Technologies International, Inc.
SM89T16R1
8-Bits Micro-controller
With 64KB Flash ROM & 1KB RAM & Two UART & RTC & ADC & PWM embedded
A) Data Memory Write with Stretch Value = 0(MOVX Instruction execute 2 machine cycles)
MOVX_Instruction_cycle
Next_Instruction
Last_Instruction
First_Machine_cycle
S1 S2 S3
Second_Machine_cycle
S1
S2
S3
S4
S4
S1
S2
S3
S4
S1
S2
S3
S4
CLK
ALE
/PSEN
WR_width
/WR
AD7-0
MOVX_Data_out
MOVX_Inst.
A7-A0
Next_inst._Read
A7-A0
A7-A0
D7-D0
D7-D0
D7-D0
A7-A0
D7-D0
MOVX_Inst._Address
MOVX_Data_Address
Next_Inst._Address
A15-A8
PORT_2
A15-A8
A15-A8
A15-A8
B) Data Memory Write with Stretch Value = 1(MOVX Instruction execute 3 machine cycles)(Default)
MOVX_Instruction_Cycle
Second_Machine_cycle
Next_Instruction
Last_Instruction
S1 S2 S3
First_Machine_cycle
S1 S2 S3
Third_Machine_Cycle
S4
S1
S2
S3
S4
S4
S1
S2
S3
S4
S1
S2
S3
S4
CLK
ALE
/PSEN
WR_width
/WR
AD7-0
Next_inst._Read
A7-A0
MOVX_Inst.
A7-A0
MOVX_Data_out
D7-D0
A7-A0
D7-D0
D7-D0
A7-A0
D7-D0
MOVX_Inst._Address
MOVX_Data_Address
Next_Inst._Address
A15-A8
PORT_2
A15-A8
A15-A8
A15-A8
C) Data Memory Write with Stretch Value = 2(MOVX Instruction execute 4 machine cycles)
MOVX_Instruction_Cycle
2'nd_Machine_cycle
Next_Instruction
S4
1'st_Machine_cycle
4'th_Machine_Cycle
Last_Instruction
S4 S2
3'rd_Machine_Cycle
S4 S2
S2
S4
S2
S4
S2
S4
S2
S1
S3
S1
S3
S1
S3
S1
S3
S1
S3
S1
S3
CLK
ALE
/PSEN
WR_width
/WR
AD7-0
Next_inst._Read
A7-A0
MOVX_Inst.
A7-A0
MOVX_Data_out
D7-D0
A7-A0
A7-A0
D7-D0
D7-D0
D7-D0
MOVX_Inst._Address
MOVX_Data_Address
Next_Inst._Address
A15-A8
PORT_2
A15-A8
A15-A8
A15-A8
Figure 15: MOVX Instruction Timing (Stretch=0~Stretch=2)
Specifications subject to change without notice contact your sales representatives for the most recent information.
Ver 2.1 SM89T16R1 08/2006
16
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
