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): 2/23頁
文件大?。?/td> 262K
代理商: L7200
L7200
10/23
SERIAL PORT
Figure 1. Serial Port Timing Information
SERIAL PORT OPERATION
The serial port interface is a bi-directional port for reading and writing programming data from/to the internal reg-
isters of this device. For data transfers SDEN is brought high, serial data is presented at the SDATA pin, and a
serial clock is applied to the SCLK pin. After the SDEN goes high , the first 16 pulses applied to the SCLK pin
will shift the data presented at the SDATA pin into an internal shift register on the rising edge of each clock. An
internal counter prevents more than 16 bits from being shifted into the register. The data in the shift register is
PARAMETER
MIN.
TYP.
MAX.
UNITS
SCLK Period, (TSCK )25
ns
SCLK low time, (TCKL )10
ns
SCLK high time, (TCKH )10
ns
Enable to SCLK (TSDENS )10
15
ns
SCLK to disable (TSDENH )
12.5
ns
Data set-up time before rising edge SCLK (TDS )5
ns
Data hold time (TDH )5
ns
Minimum SDEN low time (TSDENL)30
ns
SDEN
SCLK
SDATA
0A0
A6
A1
D0
D1
1st Byte
2nd Byte
Serial Port Write Timing
D2
D7
1A0
A6
A1
D0
D1
D7
1st Byte
2nd Byte
Serial Port Read Timing
SDEN
SCLK
SDATA
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