參數(shù)資料
型號: DM6806
廠商: Electronic Theatre Controls, Inc.
英文描述: DM5806 DATA MODULE DIGITAL I/O BOARD
中文描述: DM5806數(shù)據(jù)模塊數(shù)字I / O板
文件頁數(shù): 36/64頁
文件大?。?/td> 270K
代理商: DM6806
4-6
BA + 6: Reserved
BA + 7: Reserved
BA + 8: 8254 Timer/Counter 0 (Read/Write)
A read shows the count in the counter, and a write loads the counter with a new value. Counting begins as soon
as the count is loaded.
BA + 9: 8254 Timer/Counter 1 (Read/Write)
A read shows the count in the counter, and a write loads the counter with a new value. Counting begins as soon
as the count is loaded.
BA + 10: 8254 Timer/Counter 2 (Read/Write)
A read shows the count in the counter, and a write loads the counter with a new value. Counting begins as soon
as the count is loaded.
BA + 11: 8254 Control Word (Write Only)
Accesses the 8254 control register to directly control the three timer/counters.
D7
D6
D5
D4
D3
D2
D1
D0
Counter Select
00 = Counter 0
01 = Counter 1
10 = Counter 2
11 = read back setting
BCD/Binary
0 = binary
1 = BCD
Counter Mode Select
000 = Mode 0, event count
001 = Mode 1, programmable 1-shot
x10 = Mode 2, rate generator
x11 = Mode 3, square wave rate generator
100 = Mode 4, software-triggered strobe
101 = Mode 5, hardware-triggered strobe
Read/Load
00 = latching operation
01 = read/load LSB only
10 = read/load MSB only
11 = read/load LSB, then MSB
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