Z86L996SZ008SC 查看數據表（PDF） - Zilog

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Z86L996SZ008SC

Low-Voltage Microcontrollers with ADC

Zilog 

Z86D990/Z86D991 OTP and Z86L99X ROM

Low-Voltage Microcontrollers with ADC

41

+2

IRQ5 (T1 end-of-count)

P56

TOUT

Figure 26. Counter/Timer Output Using TOUT

The internal clock can be selected as output instead of T1 by setting TMR bits D7

and D6 both to 1. The internal clock (XTAL frequency/2) is then directly output on

P56 (Figure 27).

Internal clock

OSC

+2

P56

TOUT

TMR

TMR

Figure 27. Internal Clock Output Using TOUT

While programmed as TOUT, P56 cannot be modified by a write to port register P5.

However, the Z8 software can examine P56’s current output by reading the port

register.

TIN Modes

The Timer Mode register TMR (F1h) (Figure 28) is used in conjunction with the

Prescaler register PRE1 (F3h) (Figure 29) to configure P52 as TIN. TIN is used in

conjunction with T1 in one of four modes:

• External clock input

• Gated internal clock

• Triggered internal clock

• Retriggerable internal clock

PS003807-1002

PRELIMINARY

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