SM89516B datasheet(26/49 Pages) SYNCMOS

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SM89516B

8-Bit Micro-controller

64KB Flash

& 1KB RAM embedded

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

ISSFD-M087

Ver D SM89516B 08/07/2015

- 26 -

Mode3

If Timer 1 M1 and M0 bits are set to 1, Timer 1

stops. If Timer 0 M1 and M0 bits are set to 1,

Timer 0 acts as two independent 8 bit timers /

counters.

6.2

Timer/counter control register (TCON)

Mnemonic: TCON

Address: 88h

Reset

TF1

TR1

TF0

TR0

IE1

IT1

IE0

IT0

00h

TF1: Timer 1 overflow flag set by hardware when Timer 1 overflows. This flag can

be cleared by software and is automatically cleared when interrupt is

processed.

TR1: Timer 1 Run control bit. If cleared, Timer 1 stops.

TF0: Timer 0 overflow flag set by hardware when Timer 0 overflows. This flag can

be cleared by software and is automatically cleared when interrupt is

processed.

TR0: Timer 0 Run control bit. If cleared, Timer 0 stops.

IE1: Interrupt 1 edge flag. Set by hardware, when falling edge on external pin

INT1 is observed. Cleared when interrupt is processed.

IT1: Interrupt 1 type control bit. Selects falling edge or low level on input pin to

cause interrupt. IT1=1, interrupt 1 select falling edge trigger. IT1=0, interrupt1

select low level trigger.

IE0: Interrupt 0 edge flag. Set by hardware, when falling edge on external pin

INT0 is observed. Cleared when interrupt is processed.

IT0: Interrupt 0 type control bit. Selects falling edge or low level on input pin to

cause interrupt. IT0=1, interrupt 0 select falling edge trigger. IT0=0, interrupt

0 select low level trigger.

6.3

Mode 0 (13-bit Counter/Timer)

The timer register is configured as a 13-bit register. As the count rolls over from all 1s to all 0s, it sets the timer

interrupt flag TFx. The counted input is enabled to the timer when TRx = 1 and either GATE=0 or INTx = 1. Mode 0

operation is the same for Timer0 and Timer1.

Fig. 6-1: Mode 0 -13 bit Timer / counter operation

SM89516B Datasheet(PDF) 26 Page - SyncMOS Technologies,Inc

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