MAXQ3180 Maxim, MAXQ3180 Datasheet - Page 84

• Manufacturer Part Number: MAXQ3180
• Description: The MAXQ3180 is a dedicated electricity measurement front-end that collects and calculates polyphase voltage, current, power, energy, and many other metering and power-quality parameters of a polyphase load
• Manufacturer: Maxim

Low-Power, Multifunction, Polyphase AFE
This register is a mirror of a CPU register in the MAXQ3180. This register should not be modified by supervisory
code. This register specifies the time, in CPU clocks, that the ADC must wait after switching analog mux inputs
before beginning its conversion. This register defaults to 0x2F (47 decimal), which specifies a 48 CPU clock-cycle
delay from analog mux switching to the start of conversion.
This register is a mirror of a CPU register in the MAXQ3180. This register configures the SPI port of the MAXQ3180.
84
Bit:
Name:
Reset:
Bit:
Name:
Reset:
Bit:
Name:
Reset:
BIT
5:3
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7
6
2
1
0
CKPHA
CKPOL
NAME
ESPII
CHR
SAS
—
ESPII
15
—
—
7
1
7
Enable SPI Interrupt. If set, arrival of a character on the SPI bus causes a CPU interrupt.
SPI Slave Select Polarity. If clear, SSEL is assumed to be active low; if set, SSEL is assumed to be
active high.
Reserved.
SPI Character Length. If clear, characters on the SPI bus are assumed to be 8 bits; if set, characters on
the SPI bus are assumed to be 16 bits.
SPI Clock Phase. If clear, data is sampled on the leading edge of the clock (low-to-high if the clock is
active high, and high-to-low if the clock is active low). If set, data is sampled on the trailing edge of the
clock (high-to-low if the clock is active high, and low-to-high if the clock is active low).
SPI Clock Polarity. If clear, the clock is assumed to be active high; if set, the clock is assumed to be
active low.
SAS
14
—
6
6
0
13
—
—
5
5
0
ADC Settling Time High Byte
ADC Settling Time Low Byte
12
—
—
4
4
0
FUNCTION
ADC Settling Time (R_ADCACQ) (0x050)
0x2F
SPI Configuration (R_SPICF) (0x052)
11
—
—
3
3
0
CHR
10
—
2
2
0
CKPHA
—
9
1
1
0
CKPOL
—
8
0
0
0