N8X931AA Просмотр технического описания (PDF) - Intel
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N8X931AA Datasheet PDF : 30 Pages
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8x931AA, 8x931HA USB PERIPHERAL CONTROLLER
Table 8. Signal Description (Sheet 2 of 3)
Signal
Name
INT1:0#
KSI7:0
KSO19
KSO18
KSO17:16
KSO15:8
KSO7:0
LED3:0
OVRI#
P0.7:0
P1.7:0
P2.7:0
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
PLLSEL
PSEN#
RD#
RXD
Type
Description
Alternate
Function
I External Interrupts 0 and 1. These inputs set the IE1:0
P3.3:2
interrupt flags in the TCON register. Bits IT1:0 in TCON select
the triggering method: edge-triggered (high-to-low) or level
triggered (active low). INT1:0 also serves as external run
control for timer1:0 when selected by GATE1:0# in TCON.
I Keyboard Scan Input. Schmitt-trigger inputs with firmware- AD7:0/P0.7:0
enabled internal pullup resistors used for the input side of the
keyboard scan matrix.
O Keyboard Scan Output. Quasi-bidirectional ports with weak P3.7/RD#
internal pullup resistors used for the output side of the keyboard P3.6/WR#
scan matrix.
P3.5:4/T1:0
A15:8/P2.7:0
P1.7:0
O LED Drivers. Designed to drive LEDs connected directly to
—
VCC. The current each driver is capable of sinking is given as
VOL2 in the datasheet.
I Overcurrent Sense. Sense input to indicate an overcurrent
P3.0
condition on an external down-stream port. Active low with an
internal pullup.
I/O Port 0. Eight-bit, open-drain, bidirectional I/O port. Port 0 pins AD7:0/KSI7:0
have Schmitt trigger inputs.
I/O Port 1. Eight-bit quasi-bidirectional I/O port with internal
pullups.
KSO7:0
I/O Port 2. Eight-bit quasi-bidirectional I/O port with internal
pullups.
A15:8/KSO15:8
I/O Port 3. Eight-bit quasi-bidirectional I/O port with internal
pullups.
OVRI#
SOF#
INT0#
INT1#
T0/KSO16
T1/KSO17
WR#/KSO18
RD#/KSO19
I Phase-locked Loop Select. For normal operation using the —
8x931HA, connect PLLSEL to logic high. PLLSEL = 0 is used
for factory test only. (See Table 10). For 8x931AA operation,
see Table 11.
O Program Store Enable. Read signal output. Asserted for read —
accesses to external program memory.
O Read. Read signal output. Asserted for read accesses to
external data memory.
P3.7/KSO19
I/O Receive Serial Data. RXD sends and receives data in serial P1.6
I/O mode 0 and receives data in serial I/O modes 1, 2, and 3.
ADVANCE INFORMATION
11
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