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PC87366 数据表(PDF) 66 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 PC87366
功能描述  128-Pin LPC SuperI/O with System Hardware Monitoring, MIDI and Game Ports
PDF  240 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

PC87366 数据表(HTML) 66 Page - National Semiconductor (TI)

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2.0 Device Architecture and Configuration (Continued)
66
www.national.com
2.14.3
KBC Configuration Register
This register is reset by hardware to 40h.
Location:
Index F0h
Type:
R/W
Usage Hints:
1. To change the clock frequency of the KBC, perform the following:
a. Disable the KBC logical devices.
b. Change the frequency setting.
c. Enable the KBC logical devices.
Bit
76543210
Name
KBC Clock Source
Reserved
TRI-STATE
Control
Reset
01000000
Required
0
Bit
Description
7-6
KBC Clock Source. The clock source can be changed only when the KBC is inactive (disabled).
Bits
7 6
Source
0 0
8 MHz
0 1
12 MHz (default)
1 0
16 MHz
1 1
Reserved
5-1
Reserved
0
TRI-STATE Control. If KBD is inactive (disabled) when this bit is set, the KBD pins (KBCLK and KBDAT) are in TRI-
STATE. If Mouse is inactive (disabled) when this bit is set, the Mouse pins (MCLK and MDAT) are in TRI-STATE.
0: Disabled (default)
1: Enabled



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