at43101 ATMEL Corporation, at43101 Datasheet - Page 2

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at43101

Manufacturer Part Number
at43101
Description
Pcmcia Card Memory Interface Circuit With 256 Bytes Of Internal Attribute Memory Eeprom
Manufacturer
ATMEL Corporation
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT43101
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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
AT43101 Logical Pin Descriptions
2
Name
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*
Type
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
AT43101
Description
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
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.

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