RE46C190
DS22271A-page 20 2010 Microchip Technology Inc.
The minimum pulse width for FEED is 10 µs, while the
minimum pulse width for TEST is 100 µs. For example,
for the following options, the sequence would be:
4. After shifting in data, pull IO input to V
DD
, then
V
SS
(minimum pulse width of 10 ms) to store
shift register contents into the memory.
5. If any changes are required, power down the
part and return to Step 1. All bit values must be
reentered.
FIGURE 4-2: Timing Diagram for Mode T0.
bit 9-5 CTL<4:0>: Chamber Test Limits bits (Section 3.3)
00000 =0
00001 =1
•
•
•
11110 =30
11111 =31
bit 4-0 LTD<4:0>: Long Term Drift Sample bits (Section 3.9)
00000 =0
00001 =1
•
•
•
11110 =30
11111 =31
REGISTER 4-1: CONFIGURATION AND CALIBRATION SETTINGS REGISTER (CONTINUED)
data - 0 0 0 1 1 0 0 0 1 0 0 0 0 1
bit - 25 26 27 28 29 30 31 32 33 34 35 36 37 38
Photo Amp Gain Factor = 1
Integration Time = 200 µs
IRED Current = 100 mA
Low Battery Trip = 2.2V
Long Term Drift, Low Battery Hush and EOL are all
disabled
Hush Option = Never Cancel
Tone Select = Temporal
DD
TEST bit 25 bit 26 bit 27 bit 28 bit 29 bit 30 bit 31 bit 32 bit 33 bit 34 bit 35 bit 36 bit 37 bit 38
SS
Min Tsetup2 = 2 µs Min Tsetup1 = 1 µs Min Thold1 = 1 µs Min PW1 = 10us Min T1 = 20 µs Min Td1 = 2 µs
