
HP E1563A and E1564A Register-Based Programming
129
Appendix B
Sample Source/
Control Register
This register provides the bits that control the sample system.
Sample Source/Control register bits defined:
If bit 12 and either bit 13 or 15 is set during the same write, an ABORT followed by an INIT is executed.
If bit 12 is “0”, either bit 13 or 15 is set and the previous measurement completed, an ABORT followed
by an INIT is executed.
If bits 12, 13 and 15 are all “0”, no action is initiated.
base + 3E
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Write*
SW ARM
IMM
SW ARM
30 mS
delay
ABORT
EX_
Sample
POS_
NEG
SOFT
SAMPLE
EXT
TIME-
BASE
INT
CLOCK
EN_TTL IN/OUT
TTL_3
TTL_1
TTL_0
Read**
SW ARM
IMM
SW ARM
30 mS
delay
ABORT
EX_
Sample
POS_
NEG
SOFT
SAMPLE
EXT
TIME-
BASE
INT
CLOCK
EN_TTL IN/OUT
TTL_3
TTL_1
TTL_0
*WRITE BITS (Sample Source Register) and
**READ BITS (Sample Control Register)
bits 0-2
TTL_n
000 = TTLT0, 001 = TTLT1, 010 = TTLT2, ... , 011 = TTLT6, 111 = TTLT7.
bit 3
IN/OUT
TTLTn line is: 0 = IN, 1 = OUT.
bit 4
EN_TTL
1 = enable TTLTn, 0 = disable TTLTn
bit 5
INT Clock
0 = disable sampling from internal clock source, 1 = sample from the internal
clock source.
bit 6
EXT
Timebase
0 = timebase is internal 10 MHz clock, 1 = timebase is external clock source
you must input on the “Time Base” pin on the front panel D-subminiature
connector.
bit 7
Soft
Sample
software sample: 0 = IMMediate disabled, 1 = IMMediate enabled.
bit 8
POS_
NEG
External sample slope: 0 = NEG, 1 = POS.
bit 9
EX_
Sample
1 = EXTernal sample is an external source you must input on the “Sample”
pin on the front panel D-subminiature connector. 0 = EXTernal sample
disabled.
bit 12
ABORT
1 = aborts measurement and flushes all reading data in all memory. The bit
is set to “0” when the digitizer is initiated.
bit 13*
INIT
with 30 mS
delay
This bit will initiate measurements after a 30 mS delay when it is set to “1”. It
is set to “0” when pre-trigger readings are complete.
bit 15*
INIT IMM
This bit will initiate measurements immediately when it is set to “1”. It is set to
“0” when pre-trigger readings are complete.
Summary of Contents for E1563A
Page 8: ......
Page 24: ...24 Digitizer Module Set up ...
Page 84: ...84 Digitizer Command Reference ...
Page 110: ...110 ...
Page 138: ...138 HP E1563A and E1564A Register Based Programming Appendix B ...
Page 156: ...156 HP E1563A and E1564A Verification Tests ...