DCR600II
LC78211, 78212, 78213
Pin Functions
PinI/OInternal equivalent circuitPin function
VDD, VSS, VEEPower supply
L1 to L8, R1 to R8,
LCOM1 to LCOM4, See the block diagram.Analog switch input and output
RCOM1 to RCOM4
Serial data input (Schmitt buffer)
CL..............Clock input
CL, DI, CEI
DI...............Data input
CE .............Chip enable
Selection of one of two chips
The address is set to the values shown in the table below according to
the level input to the S pin.
S pin Address
Product
levelA0A1A2A3
SIL0101
LC78211
H1101
L0011
LC78212
H1011
L0111
LC78213
H1111
Reset input
RESIThe states of the analog switches are undefined when power is first
applied. Setting this pin low will force all switches the off state.
Operation
1. Data Input Procedure
The LC78211, LC78212 and LC78213 are controlled by inputting specified data to the CL, DI and CE pins. The
input data consists of 12 bits, of which four bits are address and eight bits are data.
Bits correspond to the L1 to L8 and R1 to R8 analog switches, and a value of one turns the corresponding switch on,
and a value of zero turns it off.
0.........Off
1.........On
The address is used when the chip is connected to a shared bus. The data (address) that must be transmitted depends
on the S pin and the particular product as shown in the table below.
S pin Address
Product
levelA0A1A2A3
L0101
LC78211
H1101
L0011
LC78212
H1011
L0111
LC78213
H1111
Note:The bit for switch eight in the LC78213 is a OdonOt care� bit, that is it can be either 0 or 1 without affecting
chip function. This is because the LC78213 has two sets of seven (not eight) circuits.
No. 4817-5/6
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ACEC
