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参数资料
| 型号： | SNJ54HC590AWR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 计数器 |
| 英文描述： | HC/UH SERIES, ASYN POSITIVE EDGE TRIGGERED 8-BIT UP BINARY COUNTER, CDFP16 |
| 封装： | CERAMIC, DFP-16 |
| 文件页数： | 12/23页 |
| 文件大小： | 804K |
| 代理商： | SNJ54HC590AWR |
SN54HC590A, SN74HC590A
8BIT BINARY COUNTERS
WITH 3STATE OUTPUT REGISTERS
SCLS039F DECEMBER 1982 REVISED SEPTEMBER 2003
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
timing diagram
RCO
QAQH
CCKEN
CCLR
OE
CCLK
COUNTER
(internal)
RCLK
Hex 01
Hex 02
Hex 03
Hex 04
Hex 05
Hex FD
Hex FE
Hex FF
Hex 00
Hex01
Hex 00
Hex 01
Hi-Z
Hex 01
Hex 05
Hex 00
TIMING SEQUENCE
1. Clear Counter (asynchronous).
2. Count up: 0x01. Store 0x00 in register.
3. Inhibit counter clock (CCKEN = HIGH). Store 0x01 in register.
4. Count 0x02, 0x03.
5. 3-state the outputs
6. Count up: 0x04
7. Enable outputs.
8. Continue up: 0x05
9. Store 0x05 in register.
10. Continue counting: 0x06...0xFD, 0xFE, 0xFF, 0x00, etc.
11. Store 0x00 in register.
Don’t
Care
Hex 00
Don’t
Care
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