AT89C5122D-RDRUM datasheet(51/208 Pages) ATMEL

部件名	AT89C5122D-RDRUM

功能描述	C51 Microcontroller with USB and Smart Card Reader Interfaces

PDF	208 Pages

Scroll/Zoom	100%

制造商	ATMEL [ATMEL Corporation]

网页	http://www.atmel.com

标志

51 / 208 page

AT83R5122, AT8xC5122/23

4202F–SCR–07/2008

I/O Port Definition

Ports vs Packages

Table 30.

I/O Number vs Packages

Port 0

Port 0 has the following functions:

–

Default function: Port 0 is an 8-bit I/O port.

–

Alternate function: Port 0 is also the multiplexed low-order address and data

bus during accesses to external Program and Data Memory. In this

application, it uses strong internal pull-ups when emitting 1’s and it can drive

CMOS inputs without external pull-ups.

Port 0 has the following configurations:

–

Default configuration: open drain bi-directional I/O port. Port 0 pins that have

1’s written to them float, and in this state they can be used as high-

impedance inputs.

–

Configuration 2: Low speed output, “KB_OUT”

–

Configuration 3: Push-pull output

Total

VQFP64

QFN64

88886

VQFP32

QFN32

-8

-8-

PLCC28

AT89C5122D-RDRUM 数据表(PDF) 51 Page - ATMEL Corporation