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W77IC32 Datasheet(PDF) 11 Page - Winbond |
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W77IC32 Datasheet(HTML) 11 Page - Winbond |
11 / 70 page Preliminary W77IC32 Publication Release Date: March 2000 - 11 - Revision A0 TR0: Timer 0 run control: This bit is set or cleared by software to turn timer/counter on or off. IE1: Interrupt 1 edge detect: Set by hardware when an edge/level is detected on INT1. This bit is cleared by hardware when the service routine is vectored to only if the interrupt was edge triggered. Otherwise it follows the pin. IT1: Interrupt 1 type control: Set/cleared by software to specify falling edge/ low level triggered external inputs. IE0: Interrupt 0 edge detect: Set by hardware when an edge/level is detected on INT0 . This bit is cleared by hardware when the service routine is vectored to only if the interrupt was edge triggered. Otherwise it follows the pin. IT0: Interrupt 0 type control: Set/cleared by software to specify falling edge/ low level triggered external inputs. Timer Mode Control Bit: 7 6 5 4 3 2 1 0 GATE C/ T M1 M0 GATE C/ T M1 M0 TIMER1 TIMER0 Mnemonic: TMOD Address: 89h GATE: Gating control: When this bit is set, Timer/counter x is enabled only while INTx pin is high and TRx control bit is set. When cleared, Timer x is enabled whenever TRx control bit is set. C/ T : Timer or Counter Select: When cleared, the timer is incremented by internal clocks. When set, the timer counts high-to-low edges of the Tx pin. M1, M0: Mode Select bits: M1 M0 Mode 0 0 Mode 0: 8-bits with 5-bit prescale. 0 1 Mode 1: 18-bits, no prescale. 1 0 Mode 2: 8-bits with auto-reload from THx 1 1 Mode 3: (Timer 0) TL0 is an 8-bit timer/counter controlled by the standard Timer 0 control bits. TH0 is a 8-bit timer only controlled by Timer 1 control bits. (Timer 1) Timer/counter is stopped. Timer 0 LSB Bit: 7 6 5 4 3 2 1 0 TL0.7 TL0.6 TL0.5 TL0.4 TL0.3 TL0.2 TL0.1 TL0.0 Mnemonic: TL0 Address: 8Ah |
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