MAX11300 Datasheet, PDF (43/54 Pages) Maxim Integrated Products – Up to 20 General-Purpose Digital I/Os

MAX11300
PIXI, 20-Port Programmable Mixed-Signal I/O with
12-Bit ADC, 12-Bit DAC, Analog Switches, and GPIO
Port Configuration Registers (Read/Write)
BIT
11:0
FIELD NAME
FUNCPRM_0[11:0]
FUNCPRM_1[11:0]
FUNCPRM_2[11:0]
FUNCPRM_3[11:0]
FUNCPRM_4[11:0]
FUNCPRM_5[11:0]
FUNCPRM_6[11:0]
FUNCPRM_7[11:0]
FUNCPRM_8[11:0]
FUNCPRM_9[11:0]
FUNCPRM_10[11:0]
FUNCPRM_11[11:0]
FUNCPRM_12[11:0]
FUNCPRM_13[11:0]
FUNCPRM_14[11:0]
FUNCPRM_15[11:0]
FUNCPRM_16[11:0]
FUNCPRM_17[11:0]
FUNCPRM_18[11:0]
FUNCPRM_19[11:0]
DESCRIPTION
FUNCPRM_i[4:0]: ASSOCIATED PORT
• Defines the port to use in conjunction with a port configured in mode 4, 8, or 11.
FUNCPRM_i[7:5]: # OF SAMPLES (for ADC-related functional modes only)
• Defines the number of samples to be captured and averaged before loading the result in the
port’s ADC data register. The coding of the number of samples is 2^{# OF SAMPLES}. The number of
samples to average can be 1, 2, 4, 8, 16, 32, 64, or 128.
FUNCPRM_i[10:8]: RANGE
• Determines the input voltage range of ports configured in input modes, or the output voltage
range of ports configured in output modes.
• In ADC- or DAC-related modes, RANGE cannot be set to 000.
VOLTAGE RANGE CODES
000
001
010
011
100
101
110
111
ADC VOLTAGE RANGE (V)
No Range Selected
0 to +10
-5 to +5
-10 to 0
0 to +2.5
Reserved
0 to +2.5
Reserved
DAC VOLTAGE RANGE (V)
No Range Selected
0 to +10
-5 to +5
-10 to 0
-5 to +5
Reserved
0 to +10
Reserved
FUNCPRM_i[11]: AVR (for ADC-related functional modes only)
• ADC voltage reference selection
• 0: ADC internal voltage reference
• 1: ADC external voltage reference (all modes except mode 6) or DAC voltage reference
determined by DACREF (mode 6 only)
FUNCPRM_i[11]: INV (for GPI-controlled functional modes only)
• Asserted to invert the data received by the GPI-configured port.
• 0: Data received from GPI-configured port is not inverted
• 1: Data received from GPI-configured port is inverted
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