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DS20006554A Datasheet(PDF) 10 Page - Microchip Technology |
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DS20006554A Datasheet(HTML) 10 Page - Microchip Technology |
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10 / 94 page  ZL30260-ZL30263 Data Sheet 10 © 2021 Microchip Technology Inc. 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 0 0 I2C, slave address 11101 00 Internal ROM 0 1 I2C, slave address 11101 01 Internal ROM 1 0 SPI Slave Internal ROM 1 1 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 0 0 0 Configuration 0 0 0 1 Configuration 1 0 1 0 Configuration 2 0 1 1 Configuration 3 1 0 0 Configuration 4 1 0 1 Configuration 5 1 1 0 Configuration 6 1 1 1 Configuration 7 Notes about the device auto-configuring from external EEPROM: 1. 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. 2. 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. 3. 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 0 0 I2C, slave address 11101 00 0 1 I2C, slave address 11101 01 1 0 I2C, slave address 11101 10 1 1 SPI Slave AC2 AC1 AC0 Auto Configuration 0 0 0 Configuration 0 0 0 1 Configuration 1 0 1 0 Configuration 2 0 1 1 Configuration 3 1 0 0 Configuration 4 1 0 1 Configuration 5 1 1 0 Configuration 6 1 1 1 Configuration 7 |
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