CS53L32A

DS513F1

31

7.2

TWO WIRE MODE

In Two Wire mode, SDA is a bidirectional data line. Data is clocked into and out of the part by the clock,

SCL, with the clock to data relationship as shown in Figure 8. There is no CS pin. Pin AD0 forms the partial

chip address and should be tied to VL or GND as required. The upper 6 bits of the 7 bit address field must

be 001000. To communicate with the CS53L32A the LSB of the chip address field, which is the first byte

sent to the CS53L32A, should match the setting of the AD0 pin. The eighth bit of the address byte is the

R/W bit (high for a read, low for a write). If the operation is a write, the next byte is the Memory Address

Pointer which selects the register to be read or written. See Section 7.3,

Memory Address Pointer (MAP).

If the operation is a read, the contents of the register pointed to by the Memory Address Pointer will be

output. Setting the auto increment bit in MAP, allows successive reads or writes of consecutive registers.

Each byte is separated by an acknowledge bit.

7.3

MEMORY ADDRESS POINTER (MAP)

INCR (Auto MAP Increment Enable)

Default = ‘0’.

0 - Disabled

1 - Enabled

MAP0-2 (Memory Address Pointer)

Default = ‘000’.

76543

210

INCR

Reserved

Reserved

Reserved

Reserved

MAP2

MAP1

MAP0

00000

000