XE8000EV110 Semtech, XE8000EV110 Datasheet - Page 84

• Manufacturer Part Number: XE8000EV110
• Description: EVAL BOARD FOR XE8802AMI035LF
• Manufacturer: Semtech
• Type: MCUr

Specifications of XE8000EV110

• Contents: Fully Assembled Evaluation Board
• For Use With/related Products: XE88LC02MI035
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

limit power consumption, pull-up resistors are only enabled when the associated pin is either a digital input or an N-
channel open-drain output with the pad set to 1. In the other cases (push-pull output or open-drain output driven
low), the pull up resistors are disabled independent of the value in RegPBPullup.
After power-on reset, the Port B is configured as an input port with pull-up. During power-on reset (see reset block
documentation) however, the pin PB[1] is pulled down in stead of pulled up. Once the power-on reset completed,
the pin PB[1] is pulled up, exactly as the other Port B pins.
The input buffer is always active, except in analog mode. This means that the Port B input should be a valid digital
value at all times unless the pin is set in analog mode. Violating this rule may lead to high power consumption.
12.7.2
Note 1: this value is indicative only since it depends on the package.
12.8 Low power comparators
If the low power comparator (CMPD) peripheral is present in the circuit, the signals on the pins PB[7:4] can be used
as inputs for these low power comparators. Although the comparators are functional independent of the Port B
configuration, it is recommended to set the pins that are used for the CMPD in analog mode without selecting any
analog lines. This is to avoid high power consumption in the digital input buffer when analog or slowly varying
digital signals are applied.
© Semtech 2006
sym
V
V
V
R
V
Cin
INH
INL
OL
PU
OH
Port B digital function specification
description
Input high voltage
Input low voltage
Output high voltage
Output low voltage
Pull-up resistance
Input capacitance
0.7*VBAT
VBAT-0.4
VSS
VSS
min
20
XE8802 Sensing Machine Data Acquisition MCU
3.5
typ
50
12-7
0.2*VBAT
VSS+0.4
VBAT
VBAT
max
80
with ZoomingADC™ and LCD driver
unit Comments
kΩ
pF
V
V
V
V
VBAT=1.2V, I
VBAT=2.4V, I
VBAT=4.5V, I
VBAT=1.2V, I
VBAT=2.4V, I
VBAT=4.5V, I
VBAT≥2.4V
VBAT≥2.4V
=12.0mA
=15.0mA
Note 1
OH
OH
OH
OL
=0.3mA
=0.3mA
=5.0mA
=8.0mA
OL
OL
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