SM89T16R1 Datasheet, PDF (15/34 Pages) SyncMOS Technologies,Inc – 8-Bits Micro-controller With 64KB Flash ROM & IKB RAM & Two UART & RTC & ADC & PWM embedded

SyncMOS Technologies Inc.
SM89T16R1
8-Bits Micro-controller
With 64KB Flash ROM & IKB RAM & Two UART & RTC & ADC & PWM embedded
A.) Signal Cycle Instruction Timing
Single_Cycle
S1
S2
S3
S4
CLK
ALE
/PSEN
AD7-0
A7-A0
Data
PORT_2
A15-A8
B.) Two Cycles Instruction Timing
Instruction_Fetch
Operand_Fetch
S1
S2
S3
S4
S1
S2
S3
S4
CLK
ALE
/PSEN
AD7-0
A7-A0
OP-CODE
A7-A0
OPERAND
PORT_2
C.) Three Cycles Instruction Timing
Instruction_Fetch
A15-A8
Operand_Fetch
A15-A8
Operand_Fetch
S1 S2 S3 S4 S1 S2 S3 S4 S1 S2 S3 S4
CLK
ALE
/PSEN
AD7-0
A7-A0 OP-CODE
A7-A0 OPERAND
A7-A0 OPERAND
PORT_2
A15-A8
A15-A8
A15-A8
D.) Four Cycles Instruction Timing
Instruction_Fetch
Operand_Fetch
Operand_Fetch
Operand_Fetch
S1 S2 S3 S4 S1 S2 S3 S4 S1 S2 S3 S4 S1 S2 S3 S4
CLK
ALE
/PSEN
AD7-0
A7-A0 OP-CODE A7-A0 OPERAND A7-A0 OPERAND A7-A0 OPERAND
PORT_2
A15-A8
A15-A8
A15-A8
A15-A8
Figure 14 Timing of various instructions
In standard 8032, the MOVX instructions take two machine cycles to execute. However in the SM89T16R1, the user
has a facility to stretch the duration of this instruction from 2 machines cycle to 9 machines. The /RD and /WR strobe
lines are also proportionately elongated. This gives the user flexibility in accessing both fast and slow peripherals
without the use of external circuitry and with minimum software overhead. See FIGURE 15
Specifications subject to change without notice contact your sales representatives for the most recent information.
SM89T16R1 V1.0 JANUARY 2005
15