Rev. 1.00, 05/04, page 351 of 544
14.3 Register
Descriptions
The keyboard buffer controller has the following registers for each channel.
•
Keyboard control register H (KBCRH)
•
Keyboard control register L (KBCRL)
•
Keyboard data buffer register (KBBR)
14.3.1
Keyboard Control Register H (KBCRH)
KBCRH indicates the operating status of the keyboard buffer controller.
Bit Bit
Name
Initial
Value R/W Description
7
KBIOE
0
R/W
Keyboard In/Out Enable
Selects whether or not the keyboard buffer controller is
used.
0: The keyboard buffer controller is non-operational
(KCLK and KD signal pins have port functions)
1: The keyboard buffer controller is enabled for
transmission and reception (KCLK and KD signal
pins are in the bus drive state)
6
KCLKI
1
R/W
Keyboard Clock In
Monitors the KCLK I/O pin. This bit cannot be modified.
0: KCLK I/O pin is low
1: KCLK I/O pin is high
5
KDI
1
R/W
Keyboard Data In:
Monitors the KDI I/O pin. This bit cannot be modified.
0: KD I/O pin is low
1: KD I/O pin is high
4 KBFSEL
1 R/W
Keyboard
Buffer Register Full Select
Selects whether the KBF bit is used as the keyboard
buffer register full flag or as the KCLK fall interrupt flag.
When KBFSEL is cleared to 0, the KBE bit in KBCRL
should be cleared to 0 to disable reception.
0: KBF bit is used as KCLK fall interrupt flag
1: KBF bit is used as keyboard buffer register full flag
Содержание H8S/2111B
Страница 2: ...Rev 1 00 05 04 page ii of xxxiv...
Страница 8: ...Rev 1 00 05 04 page viii of xxxiv...
Страница 22: ...Rev 1 00 05 04 page xxii of xxxiv...
Страница 30: ...Rev 1 00 05 04 page xxx of xxxiv...
Страница 84: ...Rev 1 00 05 04 page 50 of 544...
Страница 100: ...Rev 1 00 05 04 page 66 of 544...
Страница 126: ...Rev 1 00 05 04 page 92 of 544...
Страница 180: ...Rev 1 00 05 04 page 146 of 544...
Страница 216: ...Rev 1 00 05 04 page 182 of 544...
Страница 254: ...Rev 1 00 05 04 page 220 of 544...
Страница 268: ...Rev 1 00 05 04 page 234 of 544...
Страница 382: ...Rev 1 00 05 04 page 348 of 544...
Страница 462: ...Rev 1 00 05 04 page 428 of 544...
Страница 464: ...Rev 1 00 05 04 page 430 of 544...
Страница 488: ...Rev 1 00 05 04 page 454 of 544...
Страница 496: ...Rev 1 00 05 04 page 462 of 544...
Страница 574: ...Rev 1 00 05 04 page 540 of 544...
Страница 581: ......
Страница 582: ...H8S 2111B Hardware Manual...