Cirrus Logic CS5460A, Manual

Page: 22 / 64

CS5460A
22 DS284PP4
3.1.7 Register Read/Write
This command informs the state machine that a register access is required. On reads the addressed register is load-
ed into the output buffer and clocked out by SCLK. On writes the data is clocked into the input buffer and transferred
to the addressed register on the 24
th
SCLK.
W/R Write/Read control
0 = Read register
1 = Write register
RA[4:0] Register address bits. Binary encoded 0 to 31. All registers are 24 bits in length.
Address Abbreviation Name/Description
00000 Config Configuration Register.
00001 I
DCoff
Current Channel DC Offset Register.
00010 I
gn
Current Channel Gain Register.
00011 V
DCoff
Voltage Channel DC Offset Register.
00100 V
gn
Voltage Channel Gain Register.
00101 Cycle Count Number of A/D cycles per computation cycle.
00110 Pulse-Rate Used to set the energy-to-pulse ratio on EOUT (and EDIR).
00111 I Instantaneous Current Register (most recent current sample).
01000 V Instantaneous Voltage Register (most recent voltage sample).
01001 P Instantaneous Power Register (most recent power sample).
01010 E Energy Register (accumulated over latest computation cycle).
01011 I
RMS
RMS Current Register (computed over latest computation cycle).
01100 V
RMS
RMS Voltage Register (computed over latest computation cycle).
01101 TBC Timebase Calibration Register.
01110 Poff Power Offset Register.
01111 Status Status Register.
10000 I
ACoff
Current Channel AC Offset Register.
10001 V
ACoff
Voltage Channel AC Offset Register.
10010 Res Reserved †
. . .
. . .
10111 Res Reserved †
11000 Res Reserved †
11001 Test Reserved †
11010 Mask Mask Register.
11011 Res Reserved †
11100 Ctrl Control Register.
11101 Res Reserved †
. . .
. . .
11111 Res Reserved †
† These registers are for Internal Use only and should not be written to.
B7 B6 B5 B4 B3 B2 B1 B0
0 W/R RA4 RA3 RA2 RA1 RA0 0