AD5522JSVD AD [Analog Devices], AD5522JSVD Datasheet - Page 39

• Manufacturer Part Number: AD5522JSVD
• Description: Quad Parametric Measurement Unit With Integrated 16-Bit Level Setting DACs
• Manufacturer: AD [Analog Devices]

Preliminary Technical Data
READBACK OF PMU REGISTER
The PMU readback function is a 24 bit word, mode, address and PMU data bits.
Table 24. Readback PMU Register (Only one PMU register may be read back at any one time).
Bit
23 (MSB)
22
PMU REGISTER SPECIFIC BITS
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4, 3, 2, 1, 0 (LSB)
READBACK OF COMPARATOR STATUS REGISTER
The Comparator output status Register is a read only register giving access to the output status of each of the comparators on the chip.
Table 25 shows the format of the comparator readback word.
Table 25. Comparator Status Readback Register
Bit
23 (MSB)
22
COMPARATOR STATUS REGISTER SPECIFIC BITS
21
20
19
18
17
16
15
14
13 to 0 (LSB)
Bit name
MODE1
MODE0
CP0L0
CP0H0
CP0L1
CP0H1
CP0L2
CP0H2
CP0L3
CP0H3
Unused Readback bits
Bit name
MODE1
MODE0
CH EN
FORCE1
FORCE0
RESERVED
C2
C1
C0
MEAS1
MEAS0
FIN
SFO
SSO
CL
CPOLH
COMPARE V/I
LTMPALM
TMPALM
Unused Readback bits
Description
0
0
Channel Enable, If high selected channel is enabled, otherwise disabled.
These bits tell what force and measure mode the selected channel is in.
0
These three bits tell what forced or measured current range is set for the selected channel.
Bits MEAS1 and MEAS0 tell which measure mode is selected, voltage, current, temperature sensor or Hi-
Z.
This bit shows the status of the Force input amplifier.
The system force and sense lines may be connected to any of the four PMU channels. Reading back these
bits tell if they are switched in or not.
A logic high in this readback position tells if the Per PMU clamp is enabled, while if low, the clamp is
disabled. The clamp enable function is also available in the System Control Register. This dual
functionality allows flexible enable or disabling of this function. When reading back information on the
status of the clamp enable function, what was most recently written to the clamp register from either
System Control register or PMU register will be available in the readback word.
A logic high indicates that the PMU comparator output is enabled, while if low, it’s disabled. The
comparator output enable function is also available in the System Control Register. This dual
functionality allows flexible enable or disabling of this function. When reading back information on the
status of the comparator output enable function, what was most recently written to the comparator
register from either System Control register or PMU register will be available in the readback word.
A logic high selects indicates the selected channel is comparing voltage function, while logic low, current
function.
TMPALM corresponds to the open drain TMPALM output pin which flags the user of a temperature event
exceeding the default or user programmed level. The temperature alarm is a per device alarm, and latched
( LTMPALM ) and unlatched ( TMPALM ) bits tell a temperature event occurred and if the alarm still exists (if
the junction temperature still exceeds the programmed alarm level). To reset an alarm event, the user
must write to the CLEAR bit in the PMU register.
Will be loaded with zeros.
Description
0
1
Comparator output conditions per channel corresponding to the comparator output pins.
Will be loaded with zeros.
Rev. PrM | Page 39 of 48
AD5522