SyncMOS Technologies International, Inc.
SM89T16R1
8-Bits Micro-controller
With 64KB Flash ROM & 1KB RAM & Two UART & RTC & ADC & PWM embedded
second to use the RTC function. This bit will clear when RTCen bit set again.
The SEC [5:0] will show the second counter (range from 00H to 3BH), and the MIN [5:0] will show the minute
counter (range from 00H to 3BH) of RTC function. This two register will clear when RTCen bit set.
Interrupt:
The RTC can select each of 4 interrupt sources: 0.5 second, 1 second, 0.5 minute, and 1 minute. The interrupt vector
is 43H, it’s can wake-up CPU from POWER-DOWN mode.
The Interrupt functions are test at each test item. Like the int0 to int5 are test in PDWU function, the RTC
interrupt are test at RTC function test, the ADC interrupt are test at ADC function test.
This test item is focus in the priority test and only checks the lower voltage by each crystal.
The interrupt SFRs show as below:
IE1 ($A9H)
Bit7
Bit6
Bit5
Bit4
Bit3
EADC
Bit2
ERTC
Bit1
Bit0
ERTC: When set to ‘1’, enable the RTC interrupt. If you want to use the RTC interrupt function, must enable the EA
bit in IE.7 and enable the ERTC bit in IE1.2.
EADC: When set to ‘1’, enable the ADC interrupt. If you want to use the ADC interrupt function, must enable the EA
bit in IE.7 and enable the EADC bit in IE1.3
RTCC ($A2H)
Bit7
Bit6
INT_SEL0
Bit5
MIN.5
Bit4
MIN.4
Bit3
MIN.3
Bit2
MIN.2
Bit1
MIN.1
Bit0
MIN.0
INT_SEL1
Then select the interrupt distribution in INT_SEL [1:0] in RTCC [7:6].
The RTC can select each of 4 interrupt sources: 0.5 second, 1 second, 0.5 minute, and 1 minute. The interrupt vector
is 43H, it can wake-up CPU from POWER-DOWN mode.
IFR ($AAH)
Bit7
Bit6
Bit5
Bit4
Bit3
ADCIF
Bit2
RTCIF
Bit1
Bit0
ADCIF: When interrupt occupy the ADC interrupt flag (IFR.3) will set, and the CPU will execute the interrupt
subroutine at the interrupt vector 4BH. The ADC Interrupt Flag must clear by software.
RTCIF: When interrupt occupy the RTC interrupt flag (IFR.2) will set, and the CPU will execute the interrupt
subroutine at the interrupt vector 43H. The RTC Interrupt Flag must clear by software.
IP1 ($B9H)
Bit7
Bit6
Bit5
Bit4
Bit3
PADC
Bit2
PRTC
Bit1
Bit0
The interrupt priority can be set at IP1.2 or IP1.3.
PADC: When set to ‘1’, enable the ADC interrupt priority.
PRTC: When set to ‘1’, enable the RTC interrupt priority.
Specifications subject to change without notice contact your sales representatives for the most recent information.
Ver 2.1 SM89T16R1 08/2006
25
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
