SyncMOS Technologies International, Inc.

SM89T16R1

8-Bits Micro-controller

With 64KB Flash ROM & 1KB RAM & Two UART & RTC & ADC & PWM embedded

Specifications subject to change without notice contact your sales representatives for the most recent information.

Ver 2.1 SM89T16R1 08/2006

16

A) Data Memory Write with Stretch Value = 0(MOVX Instruction execute 2 machine cycles)

CLK

ALE

/PSEN

/WR

AD7-0

PORT_2

A7-A0

D7-D0

A7-A0

D7-D0

A7-A0

D7-D0

A7-A0

D7-D0

A15-A8

A15-A8

A15-A8

A15-A8

S1

S2

S3

S4

Last_Instruction

S1

S2

S3

S4

S1

S2

S3

S4

First_Machine_cycle

Second_Machine_cycle

S1

S2

S3

S4

Next_Instruction

WR_width

MOVX_Instruction_cycle

MOVX_Inst._Address

MOVX_Inst.

Next_Inst._Address

Next_inst._Read

MOVX_Data_Address

MOVX_Data_out

B) Data Memory Write with Stretch Value = 1(MOVX Instruction execute 3 machine cycles)(Default)

CLK

ALE

/PSEN

/WR

AD7-0

PORT_2

A7-A0

D7-D0

A7-A0

D7-D0

A7-A0

D7-D0

A7-A0

D7-D0

A15-A8

A15-A8

A15-A8

A15-A8

S1

S2

S3

S4

Last_Instruction

S1

S2

S3

S4

S1

S2

S3

S4

First_Machine_cycle

Second_Machine_cycle

S1

S2

S3

S4

Third_Machine_Cycle

WR_width

MOVX_Inst._Address

MOVX_Inst.

Next_Inst._Address

Next_inst._Read

MOVX_Data_Address

MOVX_Data_out

S1

S2

S3

S4

Next_Instruction

MOVX_Instruction_Cycle

C) Data Memory Write with Stretch Value = 2(MOVX Instruction execute 4 machine cycles)

CLK

ALE

/PSEN

/WR

AD7-0

PORT_2

A7-A0

D7-D0

A7-A0

D7-D0

A7-A0

D7-D0

A7-A0

D7-D0

A15-A8

A15-A8

A15-A8

A15-A8

S1

S2

S3

S4

Last_Instruction

S1

S2

S3

S4

S1

S2

S3

S4

1'st_Machine_cycle

2'nd_Machine_cycle

S1

S2

S3

S4

3'rd_Machine_Cycle

WR_width

MOVX_Inst._Address

MOVX_Inst.

Next_Inst._Address

Next_inst._Read

MOVX_Data_Address

MOVX_Data_out

S1

S2

S3

S4

4'th_Machine_Cycle

MOVX_Instruction_Cycle

S1

S2

S3

S4

Next_Instruction

Figure 15: MOVX Instruction Timing (Stretch=0~Stretch=2)