Datasheet

684
32133D–11/2011
UC3D
31.4.7.8 2_PIN_MODE
Enables the DATAOUT pin as an output pin. All responses sent from the aWire slave will be sent
on this pin, instead of the RESET_N pin, starting with the ACK for the 2_PIN_MODE command.
31.4.7.9 MEMORY_WRITE
This command enables programming of memory/writing to registers on the SAB. The
MEMORY_WRITE command allows words, halfwords, and bytes to be programmed to a contin-
uous sequence of addresses in one operation. Before transferring the data, the user must
supply:
1. The number of data
bytes to write + 5 (size and starting address) in the length field.
2. The size of the transfer: words, halfwords, or bytes.
3. The starting address of the transfer.
The 4 MSB of the 36 bit SAB address are submitted together with the size field (2 bits). Then fol-
lows the 4 remaining address bytes and finally the data bytes. The size of the transfer is
specified using the values from the following table:
Below is an example write command:
1. 0x55 (sync)
2. 0x80 (command)
3. 0x00 (length MSB)
4. 0x09 (length LSB)
5. 0x25 (size and address MSB, the two MSB of this byte are unused and set to zero)
6. 0x00
7. 0x00
8. 0x00
9. 0x04 (address LSB)
10. 0xCA
11. 0xFE
12. 0xBA
13. 0xBE
Table 31-17. DISABLE Details
Command Details
Command value 0x07
Additional data N/A
Possible responses
0x40: ACK (Section 31.4.8.1)
0x41: NACK (Section 31.4.8.2)
Table 31-18. Size Field Decoding
Size field Description
00 Byte transfer
01 Halfword transfer
10 Word transfer
11 Reserved