R1EX24512BSAS0A Datasheet, PDF (7/19 Pages) Renesas Technology Corp – Two-wire serial interface 512k EEPROM (64-kword × 8-bit)

R1EX24512BSAS0A/R1EX24512BTAS0A
Device Address (A0, A1, A2)
Eight devices can be wired for one common data bus line as maximum. Device address pins are used to distinguish
each device and device address pins should be connected to V_CC or V_SS. When device address code provided from SDA
pin matches corresponding hard-wired device address pins A0 to A2, that one device can be activated.
Pin Connections for A0 to A2
Memory size Max connect number
A2
512k bit
8
V_CC/V_SS *¹
Note: 1. During floating, "V_CC/V_SS" are fixed to V_SS.
Pin connection
A1
V_CC/V_SS *¹
A0
V_CC/V_SS *¹
Note
Write Protect (WP)
When the Write Protect pin (WP) is high, the write protection feature is enabled and operates as shown in the following
table. Also, acknowledgment "0" is outputted after inputting device address and memory address. After inputting write
data, acknowledgment "1"(NO ACK) is outputted.
When the WP is low, write operation for all memory arrays are allowed. The read operation is always activated
irrespective of the WP pin status.
Write Protect Area
WP pin status
V_IH
V_IL
Write protect area
512k bit
Full (512k bit)
Normal read/write operation
R10DS0025EJ0001 Rev.0.01
Sep, 01, 2010
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