AT43101 Просмотр технического описания (PDF) - Atmel Corporation

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AT43101

PCMCIA Card Memory Interface Circuit with 256 Bytes of Internal Attribute Memory EEPROM

Atmel Corporation 

Pin Configuration

AT43101 pins are defined by the following two tables. The

Pin Descriptions Table lists and describes the function of

each signal used in the chip set. The Pin Assignment Table

lists the signals connected to each pin for each mode and

the buffer type implemented for the corresponding pin. The

buffer type listed in the Pin Assignment Table does not al-

ways agree with the signal type listed in the Pin Description

Table because the chip implements buffer types that sup-

port both modes of each pin. The pullup resistors included

on chip as shown in the table have a nominal value of

375K ohms. An asterisk, “*”, appended to a signal name

indicates the signal is active low.

AT43101 Logical Pin Descriptions

Name

Type Description

D[15:0]

A[24:0]

CE2*

CE1*

OE*

WE*

REG*

ID[15:0]

IA[24:1]

SGL/DBL*

SEL[1:0]

B/A*

DEC[2:0]

IOEH*

IOEL*

IWEH*

IWEL*

IWP*

WP

ICE[7:0]*

Reset

IR*

WPATT

R/B*

IR/B*

Bidir

Input

Input

Input

Input

Input

Input

Bidir

Output

Input

Input

Input

Input

Output

Output

Output

Output

Input

Output

Output

Input

Output

Input

Output

Input

PCMCIA Data Bus

PCMCIA Address Bus

Active low, PCMCIA byte enable for odd byte

Active low, PCMCIA byte enable for even byte

Active low, PCMCIA output enable signal

Active low, PCMCIA write enable signal

PCMCIA signal high for common memory, low for attribute memory

Memory data bus

Memory address bus

Address decoder mode control input per function table

Address decoder selection inputs per function table

Mode select input. Low selects mode A, High selects mode B.

Address Inputs decoded to generate ICE[7:0]* outputs

Active low output enable for upper byte of memory

Active low output enable for lower byte of memory

Active low write enable for upper byte of memory

Active low write enable for lower byte of memory

Input from write protect switch

Output to PCMCIA write protect signal

Active low chip enable outputs for 8 pairs of memory devices

Active high reset

Output of inverted reset

Active high attribute memory protect signal

Output from IR/B* and attribute memory Ready/Busy*

Active low Ready/Busy* input for common memory

2

AT43101

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