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參數(shù)資料
| 型號(hào)： | L7200 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | DISK DRIVE MOTOR CONTROLLER, 2.6 A, PQFP64 |
| 封裝： | TQFP-64 |
| 文件頁數(shù)： | 3/23頁 |
| 文件大?。?/td> | 262K |
| 代理商： | L7200 |
11/23
L7200
latched after the 16th SCLK pulse. If less than 16 clock pulses are provided before SDEN goes low, the data
transfer is aborted.
All transfers are shifted into the serial port LSB first. The first byte of the transfer is for Address and Instruction
information. The first bit is R/W instruction bit, 0 is for WRITE and 1 is for READ. Following 3 bits are for
Combo Data Bank (all set to ‘1’). The last 4 bits are for Register Address.
Figure 2. Serial Port Data Transfer Format
INTERNAL REGISTERS DEFINITION
Reg:
0
Name:
Spindle Spin-Up Register
Type:
Write only
Address: 0Eh
BIT
LABEL
DESCRIPTION
0
START
“0” Reset and Brakes the Spindle. “1” Initiates the Spindle Start-Up
procedure.
1
EXTERNAL
“0” Spindle BEMF processing in internal mode. “1” External mode.
2
SEQINC
In external mode, a “0” to ”1” transition, increments the Spindle
Sequencer.
3
STOP
“0” Complete Internal Spindle Start-Up. “1” Stop after Inductive Sense
4
INDSENSE
“0” Normal condition. “1” in External mode, initiate the Inductive
Sense
5
SPCOAST
“0” Spindle Outputs Enabled. “1” Disabled.
6
SPINUPTIME 0
Spindle Internal Spin Up.
Bit 7
Bit 6
Time
Energization Time. First Bit.
0
10mS
7
SPINUPTIME 1
Spindle Internal Spin Up.
0
1
20mS
Energization Time. Second Bit.
1
0
30mS
1
40mS
SCLK
SDATA
SDEN
INSTRUCTION (READ/WRITE), 1BIT
ADDRESS, 4 BITS
ADDRESS, COMBO DATA BANK, 3 BITS
DATA, 8 BITS
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