參數(shù)資料
型號： PPXY8300A6T1
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： Pressure Sensor
英文描述： DIFFERENTIAL, PEIZORESISTIVE PRESSURE SENSOR, RECTANGULAR, SURFACE MOUNT
封裝： SOIC-20
文件頁數(shù)： 106/162頁
文件大?。?/td> 4316K
代理商： PPXY8300A6T1
MPXY8300 Series
Sensors
48
Freescale Semiconductor
7.3
Register Definition
The KBI includes three registers:
An 8-bit pin status and control register.
An 8-bit pin enable register.
An 8-bit edge select register.
Refer to the direct-page register summary in the Section 4 for the absolute address assignments for the KBI registers. This
section refers to registers and control bits only by their names and relative address offsets.
7.3.1
KBI Status and Control Register (
KBISC)
KBISC contains the status flag and control bits, which are used to configure the KBI.
Table 7-1 Signal Properties
Signal
Function
I/O
KBIPn
Keyboard interrupt pins
I
7
6
5
4
3
2
1
0
R
0
KBF
0
KBIE
KBMOD
W
KBACK
Reset:
0
= Unimplemented
Figure 7-2 KBI Status and Control Register
Table 7-2 KBISC Register Field Descriptions
Field
Description
7:4
Unused register bits, always read 0.
3
KBF
Keyboard Interrupt Flag — KBF indicates when a keyboard interrupt is detected. Writes have no effect on KBF.
0
No keyboard interrupt detected.
1
Keyboard interrupt detected.
2
KBACK
Keyboard Acknowledge — Writing a 1 to KBACK is part of the flag clearing mechanism. KBACK always reads
as 0.
1
KBIE
Keyboard Interrupt Enable — KBIE determines whether a keyboard interrupt is requested.
0
Keyboard interrupt request not enabled.
1
Keyboard interrupt request enabled.
0
KBMOD
Keyboard Detection Mode — KBMOD (along with the KBEDG bits) controls the detection mode of the keyboard
interrupt pins.
0
Keyboard detects edges only.
1
Keyboard detects both edges and levels.
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