SyncMOS Technologies International, Inc.
SM89T16R1
8-Bits Micro-controller
With 64KB Flash ROM & 1KB RAM & Two UART & RTC & ADC & PWM embedded
Internal Clock Source
Internal RC Oscillator
Internal RC Oscillator(Ext-Crystal OFF)
External Crystal
XT/~RG
XTOFF
0
0
1
1
0
1
0
1
External Crystal
The Priority structure and vector locations of interrupts:
Source
Flag
IE0
Priority level
Vector Address
03H
External interrupt 0
Timer 0 overflow
External interrupt 1
Timer 1 overflow
UART interrupt
1(highest)
TF0
2
0BH
IE1
TF1
3
13H
4
1BH
RI+TI
TF2+EXF2
RI_1+TI_1
RTCIF
ADCIF
IE2
5
23H
Timer 2 overflow
UART 1 interrupt
RTC interrupt
6
2BH
7
33H
8
43H
ADC interrupt
9
4BH
External interrupt 2
External interrupt 3
External interrupt 4
External interrupt 5
10
11
5BH
IE3
63H
IE4
12
6BH
IE5
13(lowest)
73H
T2MOD ($C9H)
Bit7
HC5
Bit6
HC4
Bit5
HC3
Bit4
HC2
Bit3
T2CR
Bit2
Bit1
T2OE
Bit0
DCEN
HC5: Hardware Clear /INT5 flag
HC4: Hardware Clear /INT4 flag
HC3: Hardware Clear /INT3 flag
HC2: Hardware Clear /INT2 flag
T2CR: Timer 2 Capture Reset. In the Timer2 Capture Mode this bit enables/disables hardware automatically reset
Timer2 while the value in TL2 and TH2 have been transferred into the capture register.
T2OE: Timer2 clock Output Enable bit. If set to 1, the Timer2 clock will output to P1.0.
DCEN: Down Count Enable. When set this bit then allows Timer2 to be configured as an up/down counter.
Application Reference
Valid for SM89T16R1
XI
X'tal
C1
C2
R
3MHz
30 pF
30 pF
open
6MHz
30 pF
30 pF
open
9MHz
30 pF
30 pF
open
12MHz
22 pF
22 pF
open
X'tal
SM89T16R1
R
X2
X'tal
C1
C2
R
16MHz
30 pF
30 pF
open
25MHz
15 pF
15 pF
open
C1
C2
Note:
Oscillation circuit may differs with different crystal or ceramic resonator in higher oscillation frequency which was due to each
crystal or ceramic resonator has its own characteristics.
User should check with the crystal or ceramic resonator manufacturer for appropriate value of external components.
Specifications subject to change without notice contact your sales representatives for the most recent information.
Ver 2.1 SM89T16R1 08/2006
31
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
