Datasheet

MAX71020
Single-Chip Electricity Meter AFE
24Maxim Integrated
Table 8. Hardware Control Register Map (continued)
*Default values given for standard CE code (2520 sample frequency, gain = 9).
NAME
BYTE
ADDRESS
R/W
DEFAULT
VALUE*
DESCRIPTION
IOCFG 0x30C R/W
0x0000
0F00
Contains the characteristics of the four digital I/O pins.
BIT NAME DESCRIPTION
0 DI0 Reflects logic state on DIO0
1 DI1 Reflects logic state on DIO1
2 DI2 Reflects logic state on DIO2
3 DI3 Reflects logic state on DIO3
7:4 Reserved —
8 D_OD0 Configures DIO0 as open drain if configured as output
9 D_OD1 Configures DIO1 as open drain if configured as output
10 D_OD2 Configures DIO2 as open drain if configured as output
11 D_OD3 Configures DIO3 as open drain if configured as output
15:12 Reserved —
17:16 DO
Configures DIO0.
00: High-Z
01: WPULSE
10: Logic 1
11: Logic 0
19:18 D1
Configures DIO1.
00: High-Z
01: VPULSE
10: Logic 1
11: Logic 0
21:20 D2
Configures DIO2.
00: High-Z
01: XPULSE
10: XFER_BUSY
11: Logic 0
23:22 D3
Configures DIO3.
00: High-Z
01: YPULSE
10: CE_BUSY
11: Logic
31:24 Reserved —
METER_CFG 0x30D R/W
0xFF00
0080
Configures hardware aspects of the AFE.
BIT NAME DESCRIPTION
14:0 Reserved —
15 PLS_INV
Force meter pulses to be positive-going rather than
negative-going
23:16 Reserved —
31:24 PLS_MAXWID Determines the maximum width of a meter pulse