QU80386EXTC25 Intel, QU80386EXTC25 Datasheet - Page 18

• Manufacturer Part Number: QU80386EXTC25
• Description: IC INT PROC 5V 25MHZ 132QFP
• Manufacturer: Intel

Specifications of QU80386EXTC25

• Processor Type: 386EX
• Features: 32-bit, Extended Temp
• Speed: 25MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 132-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 863826

Intel386™ EX Embedded Microprocessor
18
Table 4.
Intel386™ EX Microprocessor Pin Descriptions (Sheet 6 of 6)
TRST#
TXD1
TXD0
UCS#
V
V
WDTOUT
W/R#
WR#
NOTES:
1. X if clock source is internal; Q if clock source is external
2. Q if JTAG unit is shifting out data, Z if it is not
CC
SS
Symbol
Type
ST
O
O
O
G
O
O
O
P
Output States
P(X)/P(Q)
P(X)/P(Q)
R(WL)
H(Q)
H(Q)
H(Q)
P(X)
P(X)
H(Z)
R(1)
H(1)
R(0)
R(0)
R(0)
P(1)
H(1)
R(1)
P(1)
I(Q)
I(Q)
I(Q)
I(Q)
I(1)
I(1)
Note 1
Note 1
TAP (Test Access Port) Controller Reset resets the TAP
controller at power-up and each time it is activated. It has a
permanent weak pull-up resistor.
Transmit Data SIO1 and SIO0 transmit serial data from the
individual serial channels. TXD1 is multiplexed with DACK1#,
and TXD0 is multiplexed with P2.6.
Transmit Data SIO1 and SIO0 transmit serial data from the
individual serial channels. TXD1 is multiplexed with DACK1#,
and TXD0 is multiplexed with P2.6.
Upper Chip-select is activated when the address of a memory
or I/O bus cycle is within the address region programmed by the
user.
System Power provides the nominal DC supply input. This pin is
connected externally to a V
System Ground provides the 0 V connection from which all
inputs and outputs are measured. This pin is connected
externally to a ground board plane.
Watchdog Timer Output indicates that the watchdog timer has
expired.
Write/Read indicates whether the current bus cycle is a write
cycle or a read cycle. When W/R# is HIGH, the bus cycle is a
write cycle; when W/R# is LOW, the bus cycle is a read cycle.
Write Enable indicates that the current bus cycle is a write cycle.
Name and Function
CC
board plane.
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