Z86L71 datasheet(57/61 Pages) ZILOG

57 / 61 page

Z86L70/71/75/C71

Zilog

IR/Low-Voltage Microcontroller

DS97LVO0500

P R E L I M I N A R Y

1-57

Z8 STANDARD CONTROL REGISTER DIAGRAMS

Figure 47. Port 3 Mode Register

(F7H: Write Only)

Figure 48. Port 0 and 1 Mode Register

(F8H: Write Only)

D7 D6 D5 D4 D3 D2 D1 D0

R247 P3M

0 Port 2 Open Drain*

1 Port 2 Push-pull

0 P32 = Input

P35 = Output **

1 P32 = /DAV0/RDY0

P35 = RDY0//DAV0

0 P31 = Input (TIN)

P36 = Output (TOUT)

1 P31 = /DAV2/RDY2

P36 = RDY2//DAV2

0 = P31, P32 Digital Mode

1 = P31, P32 Analog Mode

P33 = Input

P34 = Output **

P33 = Input

P34 = /DM

P33 = /DAV1/RDY1

P34 = RDY1//DAV1

* Default Setting After Result

Note: D0 affects P34, P35 as well as Port 2.

Reserved (Must be 0)

R248 P01M

P00-P03 Mode

Output

Input*

A11-A8

Stack Selection

External

Internal*

Reserved (Must be 0)

P07-P04 Mode

Output

Input*

A15-A12

External Memory Timing

Normal*

Extended

* Default Setting After Reset.

Note: Only P00 and P07 are Available on Z86L71.

Figure 49. Port 2 Mode Register

(F8H: Write Only)

Figure 50. Interrupt Priority Register

((0) F9H: Write Only)

D7 D6 D5 D4 D3 D2 D1 D0

P27-P20 I/O Definition

0 Defines Bit as OUTPUT

1 Defines Bit as INPUT*

R246 P2M

*Default Setting After Reset

D7 D6 D5 D4 D3 D2 D1 D0

Interrupt Group Priority

000 Reserved

001 C>A>B

010 A>B>C

011 A>C>B

100 B>C>A

101 C>B>A

110 B>A>C

111 Reserved

IRQ1,IRQ4,Priority

(Group C)

0 IRQ1>IRQ4

1 IRQ4>IRQ1

IRQ0,IRQ2

Priority (Group B)

0 IRQ2>IRQ0

1 IRQ0>IRQ2

IRQ3,IRQ5Priority

(Group A)

0 IRQ5>IRQ3

1 IRQ3>IRQ5

Reserved (Must be 0)

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