TM8LR64JFN 8 388 608 BY 64BIT

TM16LR64JFN 16 777 216 BY 64BIT

SYNCHRONOUS DYNAMIC RAM MODULES

SMMS710 − MAY 1998

10

POST OFFICE BOX 1443

serial presence detect

The serial presence detect (SPD) is contained in a 256-byte serial EEPROM located on the module. The SPD

nonvolatile EEPROM contains various data such as module configuration, SDRAM organization, and timing

parameters (see Table 1 and Table 2). Only the first 128 bytes are programmed by Texas Instruments, while

the remaining 128 bytes are available for customer use. Programming is done through an IIC bus using the clock

(SCL) and data (SDA) signals. All Texas Instruments modules comply with the current JEDEC SPD Standard.

See the Texas Instruments Serial Presence Detect Technical Reference (literature number SMMU001) for

further details.

SPD contents of each TMxLR64JFN device are listed in the following tables:

Table 1

Table 2