参数资料
型号: MIC74YQS
厂商: Micrel Inc
文件页数: 4/18页
文件大小: 0K
描述: IC I/O EXPANDER I2C 8B 16QSOP
标准包装: 98
接口: I²C,SM 总线
输入/输出数: 8
中断输出:
电源电压: 2.7 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-SSOP(0.154",3.90mm 宽)
供应商设备封装: 16-QSOP
包装: 管件
产品目录页面: 1083 (CN2011-ZH PDF)
其它名称: 576-1958-5
MIC74YQS-ND
Micrel, Inc.
MIC74
October 2006
12
M9999-101006
S 00011001 A 0100 A2 A1 A0 0/A P
Alert Response Address
(master requests address
of interupting device)
P0*
/ALERT
Slave Address
(interrupting MIC74
announces its address)
Master-to-slave transmission
Slave-to-master response
STOP
ACKNOWLEDGE
R/W = READ
NOT ACKNOWLEDGE
t/INT
t/IR
*Assumes P0 interrupts properly configured and
enabled. P0 used as an example. Timing for P1
to P7 is identical.
Figure 7. Interrupt Handling Using the Alert Response Address
/A P
S0 0 0 1 A2 A1 A0 0 A 0 0 0 0 0 0
XXXXXX XX
11 A
A
Slave Address
(host addresses an MIC74)
P0*
/ALERT
Command Byte
(03h = selects status register)
Status Value
(MIC74 sends status)
Slave Address
(host addresses an MIC74)
Master-to-slave transmission
Slave-to-master response
ACKNOWLEDGE
R/W = WRITE
S 0001 A2 A1 A0 1
R/W = READ
STOP
NOT ACKNOWLEDGE
t/INT
t/R
* Assumes P0 interrupts properly configured and
enabled. P0 used as an example. Timing for P1
to P7 is identical.
STATUS register is cleared to zero following this
operation.
ACKNOWLEDGE
Figure 8. Interrupt Handling Without the Alert Response Address
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