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參數(shù)資料
| 型號(hào)： | TMS279X |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | FLOPPY DISK FORMATTERICONTROLLER FAMILY |
| 中文描述： | 軟盤驅(qū)動(dòng)FORMATTERICONTROLLER家庭 |
| 文件頁(yè)數(shù)： | 34/40頁(yè) |
| 文件大小： | 334K |
| 代理商： | TMS279X |
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TMS279X (WD279X) FLOPPY DISK FORMATTER / CONTROLLER FAMILY
34
WRITE ENABLE TIMING
PARAMETER
TEST
CONDITIONS
ALT.
SYMBOL
TSET
TSET
THLD
THLD
TWE
TDRR
TIRR
TDS
TDH
MIN
TYP
MAX
UNIT
tsu(A-WE)
tsu(CS-WE)
th(A-WE)
th(CS-WE)
tw(WE)
trs(WE-DRQ)
trs(WE-INT)
tsu(D-WE)
th(D-WE)
A0, A1 to WE# setup time
CS# to VVE# setup time
A0, A1 from WE# hold time
CS# from WE# hold time
WE# pulse duration
DRQ reset time from WE#
INTRQ reset time from WE#
Data setup time to WE#
Data hold time from WE#
50
50
10
10
200
ns
ns
ns
ns
ns
ns
ns
ns
ns
100
500
200
3000
150
50
Symbol used in Western Digital Corporation WD279X-02 Data Sheet.
* Time doubles when CLK = 1 MHz.
t SERVICE (WORST CASE): FM 27.5μs, MFM 13.5 μs.
NOTES:
2.
3.
4.
5.
6.
CS# may be permanently tied low if desired.
DRQ rising edge: indicates that the data register has assembled data
DRQ falling edge: indicates that the data register was read.
INTREQ rising edge: occurs at end of command.
INTREQ falling edge: indicates that the status register was read.
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