参数资料
型号: SC9RS08KA1J3CDB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 20 MHz, MICROCONTROLLER, PDSO6
封装: 3 X 3 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, DFN-6
文件页数: 84/134页
文件大小: 3114K
代理商: SC9RS08KA1J3CDB
Chapter 7 Keyboard Interrupt (RS08KBIV1)
SC9RS08KA2 Series Data Sheet, Rev. 1
Freescale Semiconductor
53
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 Chapter 4, “Memory,” for the absolute address assignments
for all KBI registers. This section refers to registers and control bits only by their names.
The KBI registers are summarized in Table 7-2.
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 7-2. KBI Register Summary
Name
7654
32
1
0
KBISC
R
0
000
KBF
0
KBIE
KBMOD
W
KBACK
KBIPE
R0
0
KBIPE5
KBIPE4
0
KBIPE2
KBIPE1
KBIPE0
W
KBIES
R0
0
KBEDG5 KBEDG4
0
KBEDG2 KBEDG1 KBEDG0
W
765
43
210
R
0
KBF
0
KBIE
KBMOD
W
KBACK
Reset:
00
000
0
= Unimplemented
Figure 7-3. KBI Status and Control Register (KBISC)
Table 7-3. KBISC Register Field Descriptions
Field
Description
3
KBF
Keyboard Interrupt Flag — KBF indicates that 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.
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