Section 19 Keyboard Buffer Control Unit (PS2)
Rev. 1.00 Apr. 28, 2008 Page 608 of 994
REJ09B0452-0100
19.4.9 KCLK
Fall
Interrupt Operation
In this device, clearing the KBFSEL bit to 0 in KBCRH enables the KBF bit in KBCRH to be
used as a flag for the interrupt generated by the fall of KCLK input.
Figure 19.14 shows the setting method and an example of operation.
Start
Set KBIOE
KBF = 1
(interrupt generated)
KBE = 0
(KBBR reception
disabled)
Interrupt handling
Clear KBF
KCLK pin
fall detected?
KBFSEL = 0
KBIE = 1
(KCLK falling edge
interrupts enabled)
Yes
No
KCLK
(pin state)
KBF bit
Interrupt
generated
Interrupt
generated
Cleared
by software
Note:
*
The KBF setting timing is the same as the timing of KBF setting and KCLK automatic
I/O inhibit bit generation in figure 17.11. When the KBF bit is used as the KCLK input fall
interrupt flag, the automatic I/O inhibit function does not operate.
Figure 19.14 Example of KCLK Input Fall Interrupt Operation
Содержание H8S/2100 Series
Страница 2: ...Rev 1 00 Apr 28 2008 Page ii of xxvi...
Страница 54: ...Section 1 Overview Rev 1 00 Apr 28 2008 Page 28 of 994 REJ09B0452 0100...
Страница 92: ...Section 2 CPU Rev 1 00 Apr 28 2008 Page 66 of 994 REJ09B0452 0100...
Страница 158: ...Section 5 Interrupt Controller Rev 1 00 Apr 28 2008 Page 132 of 994 REJ09B0452 0100...
Страница 244: ...Section 8 8 Bit PWM Timer PWMU Rev 1 00 Apr 28 2008 Page 218 of 994 REJ09B0452 0100...
Страница 330: ...Section 10 16 Bit Timer Pulse Unit TPU Rev 1 00 Apr 28 2008 Page 304 of 994 REJ09B0452 0100...
Страница 354: ...Section 11 16 Bit Cycle Measurement Timer TCM Rev 1 00 Apr 28 2008 Page 328 of 994 REJ09B0452 0100...
Страница 380: ...Section 12 16 Bit Duty Period Measurement Timer TDP Rev 1 00 Apr 28 2008 Page 354 of 994 REJ09B0452 0100...
Страница 416: ...Section 13 8 Bit Timer TMR Rev 1 00 Apr 28 2008 Page 390 of 994 REJ09B0452 0100...
Страница 494: ...Section 15 Serial Communication Interface SCI Rev 1 00 Apr 28 2008 Page 468 of 994 REJ09B0452 0100...
Страница 612: ...Section 18 I 2 C Bus Interface IIC Rev 1 00 Apr 28 2008 Page 586 of 994 REJ09B0452 0100...
Страница 706: ...Section 20 LPC Interface LPC Rev 1 00 Apr 28 2008 Page 680 of 994 REJ09B0452 0100...
Страница 752: ...Section 21 FSI Interface Rev 1 00 Apr 28 2008 Page 726 of 994 REJ09B0452 0100...
Страница 774: ...Section 23 RAM Rev 1 00 Apr 28 2008 Page 748 of 994 REJ09B0452 0100...
Страница 1008: ...Section 28 Electrical Characteristics Rev 1 00 Apr 28 2008 Page 982 of 994 REJ09B0452 0100...
Страница 1020: ...Rev 1 00 Apr 28 2008 Page 994 of 994 REJ09B0452 0100...
Страница 1023: ......
Страница 1024: ...H8S 2117R Group Hardware Manual...