参数资料
型号: MAX6955AAX+T
厂商: Maxim Integrated
文件页数: 18/43页
文件大小: 0K
描述: IC DRVR DSPL LED 36-SSOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1,000
显示器类型: LED
配置: 7、14、16 段
接口: I²C
电流 - 电源: 22mA
电源电压: 2.7 V ~ 5.5 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 36-BSOP(0.295",7.50mm 宽)
供应商设备封装: 36-SSOP
包装: 带卷 (TR)
MAX6955
2-Wire Interfaced, 2.7V to 5.5V LED Display
Driver with I/O Expander and Key Scan
LED OUTPUT O0
SW A0
SW B0
SW C0
SW D0
LED0
LED OUTPUT O1
SW A1
SW B1
SW C1
SW D1
LED OUTPUT O2
SW A2
SW B2
SW C2
SW D2
LED1
LED OUTPUT O3
SW A3
SW B3
SW C3
SW D3
LED2
LED OUTPUT O4
SW A4
SW B4
SW C4
SW D4
LED3
LED OUTPUT O5
SW A5
SW B5
SW C5
SW D5
LED4
LED OUTPUT O6
SW A6
SW B6
SW C6
SW D6
LED5
LED OUTPUT O7
V CC
SW A7
SW B7
SW C7
SW D7
LED SEGMENT IS OPTIONAL AND
KEY_A (P0)
KEY_B (P1)
KEY_C (P2)
KEY_D (P3)
IRQ (P4)
MICROCONTROLLER INTERRUPT
BASED ON APPLICATION.
Figure 11. Key-Scanning Configuration
A 25.6MS KEY-SCAN CYCLE
12.8MS FIRST HALF KEY-SCAN CYCLE
12.8MS SECOND HALF KEY-SCAN CYCLE
1.6ms MULTIPLEX CYCLE 1
1.6ms MULTIPLEX CYCLE 2
1.6ms MULTIPLEX CYCLE 8
1.6ms MULTIPLEX CYCLE 1
1.6ms MULTIPLEX CYCLE 6
12.5 μ s TO 187.5 μ s DIGIT PERIOD
LED OUTPUT 00
LED OUTPUT 01
LED OUTPUT 02
LED OUTPUT 03
LED OUTPUT 04
LED OUTPUT 05
LED OUTPUT 06
LED OUTPUT 07
FIRST KEY TEST
PERIOD
SECOND KEY TEST
PERIOD
START
END
START
(DEBOUNCE)
END
START OF NEXT KEY-SCAN CYCLE
INTERRUPT ASSERTED IF PERIOD
DEBOUNCE REGISTER UPDATED
Figure 12. Key-Scan Timing Diagram
18
Maxim Integrated
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