Philips Semiconductors
Product specification
4-digit LED-driver with I2C-Bus interface
SAA1064
FUNCTIONAL DESCRIPTION
a. READ mode.
b. WRITE mode.
A1, A0
S = start condition
P = stop condition
A = acknowledge
X = don’t care
= programmable address bits
SC SB SA = subaddress bits
C6 to C0
PR
= control bits
= POWER RESET flag
Fig.3 I2C-Bus format.
Address pin ADR
Four different slave addresses can be chosen by connecting ADR either to VEE, 3/8 VCC, 5/8 VCC or VCC. This results in
the corresponding valid addresses HEX 70, 72, 74 and 76 for writing and 71, 73, 75 and 77 for reading. All other
addresses cannot be acknowledged by the circuit.
February 1991
5
NXP [ NXP ]
