Datasheet S-34TS04L (ABLIC) - 10

2-WIRE SERIAL E2PROM WITH TEMPERATURE SENSOR S-34TS04L
Rev.1.0_00_U
Initial Delivery State
Initial delivery state of all address E2PROM is "FFh". All write protects are cleared.
Operation
This IC behaves as a slave device in the I2C-bus protocol. This IC has unrelated two functions as 4 K-bit E2PROM with software write protection and temperature sensor measuring ambient temperature. All operations are synchronized by the serial clock. Read and write operations are initiated by a start condition, generated by the master device. The start condition is followed by a device select code and read / write bit, and this IC generates an acknowledge bit. The 7-bit device select code is constructed of 4-bit device type identifier code (DTIC) and 3-bit code which shows the state of the SA0 pin, SA1 pin, and SA2 pin. DTIC is a code to define functions. When writing data to this IC, this IC generates an acknowledge bit during the 9th bit time, following the master device's 8-bit transmission. When data is read by the master device, the master device acknowledges the receipt of the data byte in the same way. Data transfers are terminated by a master device which generates stop condition after an acknowledge for write, and after no acknowledge for read. This IC has the timeout function. This IC shall not initiate clock stretching, which is an optional I2C-bus feature.
1. Setting of DTIC
Operation function is identified by DTIC. There are three types of DTIC of which two are used for E2PROM and one is used for temperature sensor. The E2PROM memory may be accessed using a DTIC of "1010b", and to perform the software write protection or the E2PROM page address operations a DTIC of "0110b" is required. The temperature sensor registers are accessed using a DTIC of "0011b".
2. E2PROM function
This IC has a 4 K-bit E2PROM array. The E2PROM array is devided into two pages consisting of a lower 256-byte page and an upper 256-byte page, which change over by the set E2PROM page address order. Each page has two 128-byte blocks. Each block can be set to write-protected by software write protect function. Page write operation up to 16 bytes and sequential read operation are available. All operations of the E2PROM section are inhibited to be performed during E2PROM write time. For more detail, refer to "
E2PROM Operation
".
3. Temperature sensor function
This IC has a digital temperature sensor. With the nine types of temperature sensor registers, this IC can be performed to read measured ambient temperature from register and to write configration data to register. This IC can ___________ output comparison result of ambient temperature and specified limit value from EVENT pin. Temperature sensor regularly refresh temperature register value after power-on, and can go into shutdown condition when SHDN bit is set. During shutdown condition, temperature sensor circuit is stopped and holds temperature sensor register value, reducing current consumption. All operations of the temperature sensor section are performed anytime. For more detail, refer to "
Temperature Sensor Operation
". 10