Seagate ST212 - Page 6

FIGURES
FIGURE 1: Typical +12 Volt DC Start-up Current Profile 3
FIGURE
2: Mounting Dimensions : 4
FIGURE
3: JI Connector Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6
FIGURE
4: Control/Status SignaIs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7
FIGURE
5: J2 Connector Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 8
FIGURE
6: Data SignaIs 9
FIGURE
7: Host/Drive Interface and Drive Configuration 10
FIGURE 8: Daisy-chain Configuration ~ 11
FIGURE 9: Radial Configuration 12
FIGURE 10: Control SignaIs Driver/Receiver Combination 13
FIGURE Il Read/Write Timing 14
FIGURE 12 General Step Timing 15
FIGURE 13: Slow-step Timing 15
FIGURE 14: Auto-truncation Timing 16
FIGURE 15: Drive Select 17
FIGURE 16: Typical Power-up Sequence 19
FIGURE 1'7: Fault Detection PC Board 20292-XXX 20
FIGURE
18: Fault Detection PC Board 20243-XXX 21
FIGURE 19: Data Signal Driver/Receiver Combination 22
FIGURE 20: Write Operation PC Board 20292-XXX 22
FIGURE 21: Write Operation PC Board 20243-XXX 24
FIGURE
22: 17-Sector, 512-Byte/Sector Format Example 25
FIGURE 23: Read Operation PC Board 20292-XXX 26
FIGURE
24: Read Operation PC Board 20243-XXX 27
FIGURE 25: MPU: PC Board 20292-XXX 29
FIGURE
26: MPU: PC Board 20243-XXX 30
FIGURE
27: Motor Speed Control: PC Board 20292-XXX 31
FIGURE 28: Motor Speed Control: PC Board 20249-XXX 31
FIGURE 29: Test Point Locations PC Board 20292-XXX 33
FIGURE 30: DifferentiaI Read Filter 34
FIGURE 31: Index Sensor 34
FIGURE
32: Test Point Locations PC Board 20243-XXX 35
FIGURE 33: Read Data 36
FIGURE 34: ST212 PC Board Removal 37
FIGURE 35: Index Sensor Adjustment/Removal 38
FIGURE 36: Track " Sens or Removal 39
TABLES
TABLE 1: JI Host/Drive Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . .. 7
TABLE
2: J2 Host/Drive Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . .. 9
TABLE
3: Precompensation Pattern 23
ST212 PRODUCT MANUAL/Rev. B
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