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EM6580 Datasheet(PDF) 15 Page - EM Microelectronic - MARIN SA

Part # EM6580
Description  Ultra Low Power 8-pin Flash Microcontroller
PDF  55 Pages
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Manufacturer  EMMICRO [EM Microelectronic - MARIN SA]
Direct Link  http://www.emmicroelectronic.com
Logo EMMICRO - EM Microelectronic - MARIN SA

EM6580 Datasheet(HTML) 15 Page - EM Microelectronic - MARIN SA

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EM6580
Copyright © 2007, EM Microelectronic-Marin SA
03/07, rev. J
15
www.emmicroelectronic.com
6.2 PortA as Input and its Multiplexing
The EM6580 can have up to 6 1-bit general purpose CMOS input ports. The port A input can be read at any
time, pull-up or pull-down resistors can be chosen by software.
Figure 10 explains how the inputs are treated with control signals and how they are distributed to different
peripherals and the CPU. This is also listed in Table 6.1.1 Input and Output ports overview.
Figure 8. EM6580 Multiplexed Inputs diagram
extVcheck
Qdeb
Q
QB
I0
I1
Z
S
I0
I1
Z
S
PA[4]
PA[1]
PA[0]
PA[5]
PA[3]
PA[4]
TimCk0
TimCk7
uPVar[1]
uPVar[2]
Internal Data Bus DB [3:0]
IRQPA[0/5]
IRQPA[3/4]
WakeUp on Change
PA3/4_reset
ResFlt
In
Out
Small Analogue Filter
Debounce
CkDeb
I0
I1
Z
S
debouncerYesPA[0/5]
EdgeFallingPA[0/5]
Debounce
CkDeb
I0
I1
Z
S
debouncerYesPA[3/4]
EdgeFallingPA[3/4]
WakeUp on change
In
Out
WakeUp on change
In
Out
RdRegPA
0
PA[3:0]
RdRegPA
1
PA[5:4]
irqPA[0l/5h]
irqPA[3l/4h]
WUchEnPA[0/5]
WUchEnPA[3/4]
InResAH
Qdeb
Q
QB
Qdeb
Q
QB
Input to peripherals is blocked if used for SVLD comparator input
extVcheck
to SVLD Logic
PA[1]
PA[0]
Serial Clock Input
Serial Data Input
to Timer / Event
Counter
to Serial Interface
to CPU
ResDis
PA3/4resln
Sleep
to Reset Logic
to Interrupt Logic
Sleep
All signals enter bottom, left, top and output on the right side of the boxes
Some Input functions are explained below.
6.2.1 Debouncer
The debouncer is clocked with one of the possible debouncer clocks (Ck[14] / Ck[11] / Ck[8] and can be used
only in Active or StandBy mode (as only in these two modes clocks are running). The input signal has to be
stable on two successive debouncer rising clock edges and must not change between them.
Figure 9. Debouncer function
DEBOUNCER function (signal must be stable during two Deb Clk rising edges)



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