ZUSBOPTSC01ZAC datasheet(65/402 Pages) ZILOG

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PS024604-1005

P R E L I M I N A R Y

Port A–C Control Registers

Z8FMC16100 Series Flash MCU

Product Specification

Port A–C Output Control Subregisters

The Port A–C Output Control subregisters, shown in Table 20, are accessed through the

Port A–C Control registers by writing 03h to the Port A–C Address registers. Setting the

bits in the Port A–C Output Control subregisters to 1 configures the specified port pins for

open-drain operation. These subregisters affect the pins directly and, as a result, alternate

functions are also affected.

Table 19. Port A–B Alternate Function 0 Sub-Registers

BITS

FIELD

AF0_7

AF0_6

AF0_5

AF0_4

AF0_3

AF0_2

AF0_1

AF0_0

RESET

000

R/W

R/WR/W

ADDR

If 02H in Port A-C Address Register, accessible through the Port A-C Control Register

Bit

Position

Value

(H)

Description

[7:0]

AF0

Port Alternate Function 0 select.

The alternate function 0 function is not selected.

The alternate function 0 function is selected.

Table 20. Port A–C Output Control Sub-Registers

BITS

FIELD

POC7

POC6

POC5

POC4

POC3

POC2

POC1

POC0

RESET

R/W

ADDR

If 03H in Port A–C Address Register, accessible through the Port A–C Control Register

Bit

Position

Value

(H)

Description

[7:0]

POC

Port Output Control

These bits function independently of the alternate function bit and disable the

drains if set to 1.

The drains are enabled for any output mode.

The drain of the associated pin is disabled (open-drain mode).

ZUSBOPTSC01ZAC 数据表(PDF) 65 Page - Zilog, Inc.

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