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TWI SCL all
TWI SDA all
RESET all
Figure 19-30. TWI Init and Zero Fill Blocks
TWI Slave Boot Mode (BMODE = 110)
2
The I
C host agent selects the slave (Blackfin processor) with the 7-bit
slave address of 0x5F. The processor replies with an acknowledgement and
the host can then download the boot stream. The I
comply with Philips I2C Bus Specification version 2.1.
The host device supplies the serial clock. See
Figure
19-32.
0
TWI SCL all
TWI SDA all
1
RESET all
* DURING THE PROCESSING OF INIT AND/OR ZERO FILL BLOCKS, THE ADSP-BF537 TWI
CONTROLLER STRETCHES THE SCL LINE TO INDICATE TO THE HOST THAT IT CANNOT
ACCEPT ANY BYTES AT THIS TIME.
Figure 19-31. TWI Slave Booting
ADSP-BF537 Blackfin Processor Hardware Reference
System Reset and Booting
1
1
1
BUS IDLE
DURING
PROCESSING
PROCESSING
OF A ZERO
OF AN
FILL BLOCK
INIT BLOCK
0
0
1
1
*
1
1
BUS IDLE
DURING
2
C host agent should
Figure 19-31
and
1
*
19-55
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