ATA6612-EK Atmel, ATA6612-EK Datasheet - Page 92
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ATA6612-EK
Manufacturer Part Number
ATA6612-EK
Description
BOARD DEMO LIN-MCM FOR ATA6612
Manufacturer
Atmel
Specifications of ATA6612-EK
Main Purpose
Interface, LIN + MCU
Embedded
Yes, MCU, 8-Bit
Utilized Ic / Part
ATA6612
Primary Attributes
LIN-SBC (System-Basis-Chip) Transceiver, LIN 2.0, Voltage Regulator, Window Watchdog
Secondary Attributes
8 kB Flash, 4 Power Modes: Pre-Normal, Normal, Sleep, Silent, 48-QFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Atmel ATA6612/ATA6613
Figure 6-24. Synchronization when Reading an Externally Applied Pin Value
Consider the clock period starting shortly after the first falling edge of the system clock. The
latch is closed when the clock is low, and goes transparent when the clock is high, as indi-
cated by the shaded region of the “SYNC LATCH” signal. The signal value is latched when the
system clock goes low. It is clocked into the PINxn Register at the succeeding positive clock
edge. As indicated by the two arrows tpd,max and tpd,min, a single signal transition on the pin
will be delayed between ½ and 1½ system clock period depending upon the time of assertion.
When reading back a software assigned pin value, a nop instruction must be inserted as indi-
cated in
the clock. In this case, the delay tpd through the synchronizer is 1 system clock period.
Figure 6-25. Synchronization when Reading a Software Assigned Pin Value
Figure
INSTRUCTIONS
INSTRUCTIONS
SYSTEM CLK
SYNC LATCH
SYSTEM CLK
SYNC LATCH
6-25. The out instruction sets the “SYNC LATCH” signal at the positive edge of
PINxn
PINxn
r17
r16
r17
out PORTx, r16
XXX
t
pd, max
0x00
0x00
XXX
nop
t
pd
t
pd, min
0xFF
in r17, PINx
in r17, PINx
0xFF
0xFF
9111H–AUTO–01/11
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