Rainbow Electronics ATmega128L - Manual (Page 255)

255
ATmega128(L)
2467B–09/01
G10 Input Enable 10x gain 0 0
G20 Input Enable 20x gain 0 0
GNDEN Input Ground the negative
input to comparator
when true 0 0
HOLD Input Sample&Hold signal.
Sample analog signal
when low. Hold signal
when high. If gain
stages are used, this
signal must go active
when ACLK is high. 1 1
IREFEN Input Enables Band-Gap
reference as AREF
signal to DAC 0 0
MUXEN_7 Input Input Mux bit 7 0 0
MUXEN_6 Input Input Mux bit 6 0 0
MUXEN_5 Input Input Mux bit 5 0 0
MUXEN_4 Input Input Mux bit 4 0 0
MUXEN_3 Input Input Mux bit 3 0 0
MUXEN_2 Input Input Mux bit 2 0 0
MUXEN_1 Input Input Mux bit 1 0 0
MUXEN_0 Input Input Mux bit 0 1 1
NEGSEL_2 Input Input Mux for negative
input for differential
signal, bit 2 0 0
NEGSEL_1 Input Input Mux for negative
input for differential
signal, bit 1 0 0
NEGSEL_0 Input Input Mux for negative
input for differential
signal, bit 0 0 0
PASSEN Input Enable pass-gate of
gain stages. 1 1
PRECH Input Precharge output latch
of comparator. (Active
low) 1 1
Table 104. Boundary-scan Signals for the ADC (Continued)
Signal
Name
Direction
as Seen
from the
ADC
Description
Recommen-
ded Input
when not
in Use Output Values when
Recommended Inputs
are Used, and CPU is
not Using the ADC