Z86L71 datasheet(17/61 Pages) ZILOG

17 / 61 page

Z86L70/71/75/C71

Zilog

IR/Low-Voltage Microcontroller

DS97LVO0500

P R E L I M I N A R Y

1-17

Comparator Inputs. In Analog Mode, Port 3 (P31 and

P32) have a comparator front end. P33 serves as the ref-

erence for both comparators. In this mode, the P33 internal

data latch and its corresponding IRQ1 is diverted to the

SMR Sources (excluding P31, P32, and P33) as shown in

Figure 38. In digital mode, P33 is used as D3 of the Port 3

input register which then generates IRQ1 as shown in Fig-

ure 16.

Notes: Comparators are powered down by entering STOP

Mode. For P31-P33 to be used as a Stop-Mode Recovery

source, these inputs must be placed into digital mode.

Comparator Outputs. COMP1 may be programmed to be

outputted on P34 through the PCON register (Figure 15).

Power-On Reset. the typical reset output time is 5 ms.

The Z86L7X does not reset WDTMR, SMR, P2M, or P3M

registers on a Stop-Mode Recovery operation.

Figure 11. Port 3 Conﬁguration

Port 3

(I/O or Handshake)

Z86L7X

MCU

Pref1

P31

P32

P33

P34

P35

P36

P37

Note:

P31, 32, 33 have a 200 K

Ω

mask option

200 K

Ω

Mask

Option

R247 = P3M

P31 (AN1)

P32 (AN2)

P33 (REF2)

From Stop-Mode

Recovery Source of SMR

1 = Analog

0 = Digital

IRQ2, P31 Data Latch

IRQ0, P32 Data Latch

IRQ1, P33 Data Latch

DIG.

AN.

Pref

Comp1

Comp2

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