Write Buffer (Download Microcode) Command - Seagate STT20000A Product Manual

Chapter 5

Write Buffer (download microcode) command

Bit 7
Byte
0
1
2
3
4
5
6 (MSB)
7
8
9
Page 64
6 5
Reserved
The Write Buffer command is intended only to provide a method for downloading
new drive microcode (firmware) into Flash EPROM, so the only valid MODE is 101
(download microcode and save). The drive must be Not Ready (unloaded) for this
command to be accepted, and the transfer length is set to the download file size,
which is currently 0x026800. All data is transferred in one command.
4 3
Operation code (3Bh)
Reserved
Reserved
Reserved
Reserved
Transfer Length
Reserved
ATAPI Interface
2 1
101 (Mode)
STT20000A Product Manual
0
(LSB)