AM93LC86

16384-bits Serial Electrically Erasable PROM

(Preliminary)

Anachip Corp.

www.anachip.com.tw

Rev 0.1 Oct 20, 2003

4/12

Symbol

Parameter

Max

Unit

Output capacitance

5

pF

Input capacitance

5

pF

Note: The parameter is characterized and isn’t 100% tested.

Instruction Set

Address

Input data

Instruction

(note)

Start bit

Op code

X8

X16

×

8

×

16

READ

1

10

-

-

EWEN

1

00

11XXXXXXXXX

11XXXXXXXX

-

-

WRITE

1

01

WRAL

1

00

01XXXXXXXXX

01XXXXXXXX

EWDS

1

00

00XXXXXXXXX

00XXXXXXXX

-

-

ERASE

1

11

-

-

ERAL

1

00

10XXXXXXXXX

10XXXXXXXX

-

-

Note:

READ: Read

EWDS: Erase/write disable

EWEN: Erase/write enable

ERASE: Erase

WRITE: Write

ERAL: Erase all

WRAL: Write all

Functional Description

Endurance and data retention

The AM93LC86 is designed for applications

requiring up to 1M programming cycles (WRITE,

WRAL, EARSE and ERAL). It provides 40 years of

secure data retention.

Device operation

The AM93LC86 is controlled by seven 13-bit

instructions. Instructions are clocked in (serially) on

the DI pin. Each instruction begins with a logical "1"

(the start bit). This is followed by the opcode (2 bits),

the address field (10/11 bits), and data, if

appropriated,. The clock signal (SK) may be halted

at any time and the AM93LC86 will remain in its last

state. This allows full static flexibility and maximum

power conservation.

Auto increment read operations

Sequential read is possible, since the AM93LC86

has been designed to output a continuous stream

of memory

content

in

response to a

single

read

operation instruction. To utilize this function, the

system asserts a read instruction specifying a start

location address. Once the 8-bit or 16-bit of the

addressed word have been clocked out, the data in

consecutively higher address locations is output.

The address will wrap around continuously with CS

high until the chip select (CS) control pin is brought

low. This allows for single instruction data dumps to

be executed with a minimum of firmware overhead.

Read (READ)

The READ instruction is the only instruction that

outputs serial data on the DO pin. After the read

instruction and address have been decoded, data is

transferred from the selected memory register into

a 8-bit or 16-bit serial shift register. (Please note

that one logical "0" bit precedes the actual 8-bit or

16-bit output data string.) The output on DO

changes during the rising edge transitions of SK.

(shown in figure 3)