Microchip Technology ARD00330 データシート
2010 Microchip Technology Inc.
Preliminary
DS39979A-page 459
PIC18F87J72 FAMILY
B.6.3
GAIN CONFIGURATION REGISTER
This registers contains the settings for the PGA gains
for each channel, as well as the BOOST options for
each channel.
for each channel, as well as the BOOST options for
each channel.
REGISTER B-3:
GAIN: GAIN CONFIGURATION REGISTER (ADDRESS 0x08)
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
PGA_CH1
<2>
PGA_CH1
<1>
PGA_CH1
<0>
BOOST<1>
BOOST<0>
PGA_CH0
<2>
PGA_CH0
<1>
PGA_CH0
<0>
bit 7
bit 0
Legend:
R = Readable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-5
PGA_CH1<2:0>: PGA Setting for Channel 1 bits
111 = Reserved (Gain = 1)
110 = Reserved (Gain = 1)
101 = Gain is 32
100 = Gain is 16
011 = Gain is 8
010 = Gain is 4
001 = Gain is 2
000 = Gain is 1
111 = Reserved (Gain = 1)
110 = Reserved (Gain = 1)
101 = Gain is 32
100 = Gain is 16
011 = Gain is 8
010 = Gain is 4
001 = Gain is 2
000 = Gain is 1
bit 4-3
BOOST<1:0>: Current Scaling for High-Speed Operation bits
11 = Both channels have current x 2
10 = Channel 1 has current x 2
01 = Channel 0 has current x 2
00 = Neither channel has current x 2
11 = Both channels have current x 2
10 = Channel 1 has current x 2
01 = Channel 0 has current x 2
00 = Neither channel has current x 2
bit 2-0
PGA_CH0<2:0>: PGA Setting for Channel 0 bits
111 = Reserved (Gain = 1)
110 = Reserved (Gain = 1)
101 = Gain is 32
100 = Gain is 16
011 = Gain is 8
010 = Gain is 4
001 = Gain is 2
000 = Gain is 1
111 = Reserved (Gain = 1)
110 = Reserved (Gain = 1)
101 = Gain is 32
100 = Gain is 16
011 = Gain is 8
010 = Gain is 4
001 = Gain is 2
000 = Gain is 1