XE8806A SEMTECH [Semtech Corporation], XE8806A Datasheet - Page 65
XE8806A
Manufacturer Part Number
XE8806A
Description
Ultra Low-Power Low-Voltage
Manufacturer
SEMTECH [Semtech Corporation]
Datasheet
1.XE8806A.pdf
(143 pages)
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11.1 Features
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11.2 Overview
PortA is a general purpose 8 bit wide digital input port, with interrupt capability. Figure 11-1 shows its structure.
© Semtech 2006
input port, 8 bits wide
each bit can be set individually for debounced or direct input
each bit can be set individually for pull-up or not
snap-to-rail option for each input
each bit is an interrupt request source on the rising or falling edge
a system reset can be generated on an input pattern
PA[0] and PA[1] can generate two events for the CPU, individually maskable
PA[0] to PA[3] can be used as clock inputs for the counters/timers/PWM (product dependent)
VBat
Vss
logic
8
8
8
1
0
8x
debounce
1
Port A
11
10
01
00
0
Figure 11-1: structure of Port A
8x
DebFast
(RegPACtrl(0))
0
1
11-2
8
8
1
0
8x
8
8
8
8
RegPASnaptorail
RegPADebounce
RegPAPullup
RegPAEdge
RegPARes1
RegPARes0
RegPACtrl
RegPAIn
resetfromporta
interrupts
events
cntclocks
1kHz
32kHz
XE8806A/XE8807A
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