AS3630 datasheet(42/72 Pages) AMSCO

42 / 72 page

AS3630 – 42

8A Supercap Flash Driver

acknowledges the slave address + write bit, the master

transmits a register address to the AS3630. This sets the

transmit zero or more bytes of data, with the AS3630

acknowledging each byte received. The address pointer

will increment after each data byte is transferred. The

master generates a STOP condition to terminate the

data write.

Slave Transmitter Mode (Read Mode): The first byte is

received and handled as in the slave receiver mode.

However, in this mode, the direction bit indicates that

the transfer direction is reversed. Serial data is

transmitted on SDA by the AS3630 while the serial clock

is input on SCLK. START and STOP conditions are

recognized as the beginning and end of a serial transfer

(Figure 39 and Figure 40). The slave address byte is the

first byte received after the master generates a START

condition. The slave address byte contains the 7-bit

AS3630 address, which is shown in Figure 42, followed

by the direction bit (R/W), which, for a read, is 1.12 After

receiving and decoding the slave address byte the

device outputs an acknowledge on the SDA line. The

AS3630 then begins to transmit data starting with the

a read mode the first address that is read is the last one

stored in the register pointer. The AS3630 must receive

a “not acknowledge” to end a read.

Figure AS3630 – 38:

Data Write - Slave Receiver Mode

11. The address for writing to the AS3630 is shown in Figure 42

12. The address for read mode from the AS3630 is shown in Figure 42

Figure 42

XXXXXXXX

<Data(n)>

<Data(n+1)>

<Data(n+X)>

S - Start

A - Acknowledge (ACK)

P - Stop

Data Transferred

(X + 1 Bytes + Acknowledge)

AS3630 Datasheet(PDF) 42 Page - ams AG