DS20006554A datasheet(10/94 Pages) MICROCHIP

10 / 94 page

ZL30260-ZL30263

Data Sheet

DS20006554A

5.2.1

ZL30260 and ZL30262

—Internal ROM, External or No EEPROM

For these part numbers the IF[1:0] pins specify the processor interface mode, the I2C slave address and whether the

device should auto-configure from internal ROM or external EEPROM. The AC[2:0] pins specify which device

configuration in the ROM or EEPROM to execute after reset. Descriptions of the standard-product ROM

configurations are available from Microchip.

IF1

IF0

Processor Interface

Configuration Memory to Use

I2C, slave address 11101 00

Internal ROM

I2C, slave address 11101 01

Internal ROM

SPI Slave

Internal ROM

SPI Master during auto-configuration

then SPI Slave

External SPI EEPROM

To configure the device as specified in the first three rows above but without auto-configuring from internal ROM, wire devices pins as

follows: TEST=1 and AC[2:0]=011, as described in section 5.2.

AC2

AC1

AC0

Auto Configuration

Configuration 0

Configuration 1

Configuration 2

Configuration 3

Configuration 4

Configuration 5

Configuration 6

Configuration 7

Notes about the device auto-configuring from external EEPROM:

The device’s CSN pin should have a pull-up resistor to VDD to ensure its processor interface is inactive after

auto-configuration is complete. The SCLK, MISO and MOSI pins should also have pull-up resistors to VDD

to keep them from floating.

If a processor or similar device will access device registers after the device has auto-configured from external

EEPROM, the SPI SCLK, MOSI and MISO wires can be connected directly to the processor, the device and

the external EEPROM. The processor and device CSN pins can be wired together also. The EEPROM CSN

signal must be controlled by the device’s CSN pin during device auto-configuration and then held inactive

when the processor accesses device registers.

The bits of the I2C address are as shown above by default but can be changed in the I2CA register.

5.2.2

ZL30261 and ZL30263

—Internal EEPROM

For these part numbers the IF[1:0] pins specify the processor interface mode and the I2C slave address. The AC[2:0]

pins specify which device configuration in the EEPROM to execute after reset.

IF1

IF0

Processor Interface

I2C, slave address 11101 00

I2C, slave address 11101 01

I2C, slave address 11101 10

SPI Slave

AC2

AC1

AC0

Auto Configuration

Configuration 0

Configuration 1

Configuration 2

Configuration 3

Configuration 4

Configuration 5

Configuration 6

Configuration 7

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