25
Table 4-5 256 Kbit Serial SPI EEPROM (25LC256IST) Pinout
Board
Reference
Signal Name
IO Standard
Function
U14.1,
U15.1
SS_N1
SS_N2
3.3V
Chip Select (Active low)
U14.2,
U15.2
MISO1
MISO2
3.3V
Serial Data Output
U14.3,
U15.3
Pull-up resistor to
3.3V
3.3V
Write Protect (Active low)
U14.4,
U15.4
GND
GND
Ground
U14.5,
U15.5
MOSI1
MOSI2
3.3V
Serial Data Input
U14.6,
U15.6
SCK1,
SCK2
3.3V
Serial Clock Input
U14.7,
U15.7
Pull-up resistor to
3.3V
3.3V
Hold Input (Active low)
U14.8,
U15.8
3.3V
3.3V
Supply Voltage
Table 4-6 4 Kbit Serial I2C EEPROM (24LC08B) Pinout
Board
Reference
Signal Name
IO Standard
Function
U10.1,
U11.1
GND
GND
Address bus bit 0
U10.2,
U11.2
Pull-up resistor to
3.3V
3.3V
Address bus bit 1
U10.3,
U11.3
Pull-down
resistor to GND
GND
Address bus bit 2
U10.4,
U11.4
GND
GND
Ground
U10.5,
U11.5
SMBSDA1,
SMBSDA2
3.3V
Serial Data
U10.6,
U11.6
SMBSCL1,
SMBSCL2
3.3V
Serial Clock
U10.7,
U11.7
Pull-down
resistor to GND
GND
Write Protect
U10.8,
U11.8
VCC
3.3V
3.3V Power Supply
