APPENDIX A-4: M Signal I/O Definitions
T200H/M and 200EH/EM Menu Trees (05147J DCN7141)
A-14
APPENDIX A-4: M Signal I/O Definitions
Table A-4: Signal I/O Definitions
Signal Name
Bit or Channel
Number
Description
Internal inputs, U7, J108, pins 9–16 = bits 0–7, default I/O address 322 hex
0–7
Spare
Internal outputs, U8, J108, pins 1
–
8 = bits 0
–
7, default I/O address 322 hex
ELEC_TEST
0
1 = electrical test on
0 = off
OPTIC_TEST
1
1 = optic test on
0 = off
PREAMP_RANGE_HI
2
1 = select high preamp range
0 = select low range
O3GEN_STATUS
3
0 = ozone generator on
1 = off
4–5
Spare
I2C_RESET
6
1 = reset I
2
C peripherals
0 = normal
I2C_DRV_RST
7
0 = hardware reset 8584 chip
1 = normal
Control inputs, U11, J1004, pins 1–6 = bits 0–5, default I/O address 321 hex
EXT_ZERO_CAL
0
0 = go into zero calibration
1 = exit zero calibration
EXT_SPAN_CAL
1
0 = go into span calibration
1 = exit span calibration
EXT_LOW_SPAN
20
2
0 = go into low span calibration
1 = exit low span calibration
REMOTE_RANGE_HI
21
3
0 = remote select high range
1 = default range
CAL_MODE_0
5
CAL_MODE_1
CAL_MODE_2
0
1
2
Three inputs, taken as binary number (CAL_MODE_2 is
MSB) select calibration level and range:
0 & 7 = Measure
1 = Zero, range #3
2 = Span, range #3
3 = Zero, range #2
4 = Span, range #2
5 = Zero, range #1
6 = Span, range #1
4–5
Spare
6–7
Always 1
Control inputs, U14, J1006, pins 1
–
6 = bits 0
–
5, default I/O address 325 hex
0–5
Spare
6–7
Always 1
Control outputs, U17, J1008, pins 1
–
8 = bits 0
–
7, default I/O address 321 hex
0–7
Spare
07270D DCN7141