Fujitsu MHT2020AT Product Manual page 15

4.6.2
4.6.3
4.6.4
4.7
4.7.1
4.7.2
4.7.3
4.7.4
4.7.5
CHAPTER 5 Interface..................................................................................... 5-1
5.1
5.1.1
5.1.2
5.2
5.2.1
5.2.2
5.2.3
5.3
5.3.1
5.3.2
5.3.3
5.4
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.5
5.5.1
5.5.2
5.5.3
C141-E192-01EN
Write circuit .......................................................................................... 4-9
Read circuit ......................................................................................... 4-11
Digital PLL circuit .............................................................................. 4-12
Servo Control ........................................................................................ 4-13
Servo control circuit ........................................................................... 4-13
Data-surface servo format................................................................... 4-16
Servo frame format ............................................................................. 4-18
Actuator motor control ....................................................................... 4-19
Spindle motor control ......................................................................... 4-20
Physical Interface.................................................................................... 5-2
Interface signals .................................................................................... 5-2
Signal assignment on the connector...................................................... 5-3
Logical Interface ..................................................................................... 5-6
I/O registers........................................................................................... 5-7
Command block registers ..................................................................... 5-8
Control block registers........................................................................ 5-13
Host Commands.................................................................................... 5-14
Command code and parameters .......................................................... 5-14
Command descriptions ....................................................................... 5-18
Error posting ..................................................................................... 5-107
Command Protocol ............................................................................. 5-109
PIO Data transferring commands from device to host...................... 5-109
PIO Data transferring commands from host to device...................... 5-111
Commands without data transfer ...................................................... 5-113
Other commands ............................................................................... 5-115
DMA data transfer commands .......................................................... 5-115
Ultra DMA Feature Set....................................................................... 5-118
Overview........................................................................................... 5-118
Phases of operation ........................................................................... 5-119
Ultra DMA data in commands.......................................................... 5-119
Contents
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