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126 Register-Based Programming Appendix B
ID Register Reading the ID register returns FFF
16
in the least significant bits to indicate
the manufacturer is Hewlett-Packard and the module is an A16 register-
based device.
Reading the Register Via Command Module PEEK command: DIAG:PEEK? 2083328,16
(2083328 = base with logical address 40 + 0 offset - see Figure B-2)
Via Digitizer Module PEEK command: DIAG:PEEK? 0 (0 signifies the first
word, 16 bits, zero-base numbering system)
Device Type
Register
Reading the Device Type Register returns 266
16
in the least significant bits
to identify the device as the E1563A 2-Channel Digitizer or 267
16
in the least
significant bits to identify the device as the E1564A 4-Channel Digitizer.
Reading the Register Via Command Module PEEK command: DIAG:PEEK? 2083330,16
(2083328 = base with logical address 40 + 02 offset - see Figure B-2)
Via Digitizer Module PEEK command: DIAG:PEEK? 1 (1 signifies the
second word, 16 bits, zero-base numbering system)
Status/Control
Register
Writes to the Status/Control Register (base + 04
16
) which enables you to
reset the module and set either A24 or A32 decoding. You can also read the
MODID bit.
Trigger Control/Source Register
base + 3C
16
Sample Control/Source Register
base + 3E
16
Description Address
base + 00
16
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Read Device Class
11
Addr Space
00
Manufacturer ID - returns FFF
16
(-12289
10
) in Hewlett-Packard A16 only
register-based
base + 02
16
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Read
01 1 1
E1563A (2-Channel Digitizer) = 266
16
(614
10
)
E1564A (4-Channel Digitizer) = 267
16
(615
10
)
base + 04
16
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Write* A Unde-
fined
MOT-
INTEL
A24 Undefined F E Undefined S R
Read** A M MOT-
INTEL
A24 Unde-
fined
Memory Size F E Arm Delay RDY P S R