AS3665 datasheet(44/78 Pages) AMSCO

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AS3665

Datasheet, Confidential - D e ta i l e d D e s c r i p t i o n I

2C mode Serial Data Bus

Figure 24. Data Read (Write Pointer, Then Read) - Slave Receive and Transmit

Blockwrite/read boundaries

If more than a single data-byte is written to or read from the AS3665 the address boundaries described in Table 54shall

not be crossed

13:

Program Downloading

There are two possibilities to download programs - Program Direct Access and Program Download using Page

Select

14:

Program Direct Access

Wring to I

2C register Program_Direct_Access allows direct access to the complete internal program memory using a

single blockwrite command. Program downloading starts from address <n> and each program word is transferred with

two I

2C bytes (MSB first) as shown in Figure 25.

Table 54. Blockwrite/read boundaries

Area

Start

End

Area 1

00h

0Fh

Area 2

10h

18h

Area 3

19h

3Eh

Area 4 - Program Page Select

5Fh

Area 5 - Program Access

60h

7Fh

Area 7

80h

CEh

Area 8 - SRAM

D0h

DFh

Area 9 - Program Direct Access

FEh - special I

2C command

13.A single blockread or write shall not operate e.g. from 5Fh to 62h.

14.Choose the type of program download which fits best to the I

2C controller

1000XXX

XXXXXXXX

1000XXX

<Data(n+2)>

S - Start

Sr - Repeated Start

A - Acknowledge (ACK)

P - Stop

NA -Not Acknowledge (NACK)

XXXXXXXX

<Data(n)>

<Data(n+1)>

<Data(n+X)>

Data Transferred

(X + 1 Bytes + Acknowledge)

Note: Last data byte is followed by a NACK

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