TDC-GP30 datasheet(49/89 Pages) AMSCO

49 / 89 page

Ultrasonic Flow Converter

Vol. 1

TDC-GP30

6-4

www.acam.de

DB_GP30Y_Vol1_en.docx V0.0

6.2

EEPROM Interface

The EEPROM interface for an external memory extension (e.g. for backup purpose) is a separate,

independent unit, integrated in the GPIO unit, which can be controlled by firmware of the integrated

CPU.

The EEPROM interface is a master interface suited for a single two-wire connection to an I2C

compatible EEPROM in fast mode (400 k). It does not support I2C spike suppression or output slope

control.

E2P_SCL:

Serial clock line

E2P_SDA:

Serial data line (bidirectional)

The assignment of E2P signal lines to GPIOs can be configured by E2P_MODE in CR_PI_E2P as

follows:

E2P_MODE

GPIO0

E2P_SCL

GPIO1

E2P_SDA

GPIO2

E2P_SCL

GPIO3

E2P_SDA

GPIO4

GPIO5

E2P_SCL

GPIO6

E2P_SDA

*) as configured by GPx_DIR & GPx_SEL (see above)

A 7-bit slave address of external EEPROM can be configured by E2P_ADR in CR_PI_E2P. With

E2P_PU_EN in CR_PI_E2P internal pullup resistors can connected to both EEPROM signal lines.

The general FW library of GP30 provide subroutines for EEPROM communication. For more details,

please refer to DB_GP30Y_Firmware.

TDC-GP30 Datasheet(PDF) 49 Page - ams AG