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PC87309VLJ датащи(PDF) 160 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
номер детали PC87309VLJ
подробное описание детали  PC87309 SuperI/O Plug and Play Compatible Chip in Compact 100-Pin VLJ Packaging
PDF  192 Pages
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87309VLJ датащи(HTML) 160 Page - National Semiconductor (TI)

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Mouse and Keyboard Controller (KBC) (Logical Devices 5 and 6)
160
www.national.com
Bit 0 of the Interrupt Type registers (index 71h for each log-
ical device) determines whether the interrupts are passed
(bit 0 = 0) or latched (bit 0 = 1). If bit 0 = 0, interrupt request
signals (P24 and P25) are passed directly to the selected
IRQ pin. If bit 0 = 1, interrupt request signals that become
active are latched on their rising edge, and held until read
from the KBC output buffer (port 60h).
FIGURE FIGURE 8-3 "Interrupt Request Logic" illustrates
the internal interrupt request logic.Refer to FIGURE 8-4 "In-
struction Timing" for a timing diagram.
FIGURE 8-3. Interrupt Request Logic
FIGURE 8-4. Instruction Timing
Note: The EN FLAGS command (for routing OBF and IBF onto P24 and P25 in the 8042) causes unpredictable results and
should not be issued
From Mouse IRQ
A15-0
AEN
Address
Decoder
MR
Port 60
Read
Mouse IRQ Feedback
From KBC IRQ
PR
Q
D
CLR
“1”
0
1
MUX
Interrupt
KBC IRQ Feedback
CLK
Interrupt Enable
A15-0
AEN
RD
Address
Decoder
Port 60
Read
Interrupt Enable
MR
RD
(1 = Latch)
Interrupt
(0 = Invert)
Type
Polarity
0
1 MUX
Plug and
Play Matrix
PR
Q
D
CLR
“1”
0
1
MUX
Interrupt
CLK
(1 = Latch)
Interrupt
(0 = Invert)
Type
Polarity
0
1 MUX
Plug and
Play Matrix
S1
S2
S3
S4
S5
S1
1 Instruction Cycle = 15 Clock Cycles
KBC CLK



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