SMM605 datasheet(16/23 Pages) SUMMIT

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SMM605

Preliminary Information

Summit Microelectronics, Inc

2064 1.1 09/16/03

WRITE PROTECTION

The SMM605 powers up into a write protected mode.

Writing a code to the volatile write protection register

can disable the write protection. The write protection

1001BIN.

Writing 0101BIN to bits [7:4] of the write protection

while writing 0101BIN to bits [3:0] allow writes to the

configuration registers. The write protection can re-

enable by writing other codes (not 0101BIN) to the write

protection register.

Writing to the write protection

CONFIGURATION REGISTERS

The majority of the configuration registers are grouped

with the general-purpose memory located at either

slave address 1010BIN or 1011BIN. The bus address

bits, A[1:0], used to differentiate the general-purpose

memory from the configuration registers are set to

11BIN. Bus address bit A[2] can be programmed as

either 0 or biased by the A2 pin.

Two additional configuration registers are located at

addresses 83HEX and 84HEX of slave address 1001BIN.

Writing and reading the configuration registers is

shown in Figures 14 and 16.

Note: Configuration writes or reads of registers 00HEX

to 0FHEX should not be performed while the SMM605 is

margining.

GENERAL-PURPOSE MEMORY

The 4k-bit general-purpose memory is located at

either slave address 1010BIN or 1011BIN. The bus

address bits, A[1:0], used to differentiate the general-

purpose memory from the configuration registers are

set to 00BIN for the first 2k-bits and 01BIN for the second

2k-bits. Bus address bit A[2] can be programmed as

either 0 or biased by the A2 pin.

The word address must be set each time the memory

is accessed. Memory writes and reads are shown in

Figures 17, 18 and 19.

COMMAND AND STATUS REGISTERS

The command and status registers are located at

slave address 1001BIN.

Writes and reads of the

command and status registers are shown in Figures

20 and 21.

GRAPHICAL USER INTERFACE (GUI)

Device configuration utilizing the Windows based

SMM605 graphical user interface (GUI) is highly

recommended. The software is available from the

Summit website (www.summitmicro.com). Using the

GUI in conjunction with this datasheet and application

note 40 simplifies the process of device prototyping

and the interaction of the various functional blocks. A

programming Dongle (SMX3200) is available from

Summit to communicate with the SMM605. The

Dongle connects directly to the parallel port of a PC

and programs the device through a cable using the I

bus protocol.

Slave Address Bus Address Register Type

1001BIN

A2 A1 A0

Write Protection Register,

Command and Status Registers,

Two Configuration Registers

A2 0 0

st 2-k Bits of General-Purpose Memory

A2 0 1

nd 2-k Bits of General-Purpose Memory

1010BIN

1011BIN

A2 1 1

Configuration Registers

Table 1 - Address bytes used by the SMM605.

I2C PROGRAMMING INFORMATION (CONTINUED)

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