User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 453 of 909 2019 Ambiq Micro, Inc.
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Table 653: CFGB Register
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
GPIO15INTD
GPIO15OUTCFG
GPIO15INCFG
GPIO14INTD
GPIO14OUTCFG
GPIO14INCFG
GPIO13INTD
GPIO13OUTCFG
GPIO13INCFG
GPIO12INTD
GPIO12OUTCFG
GPIO12INCFG
GPIO11INTD
GPIO11OUTCFG
GPIO11INCFG
GPIO10INTD
GPIO10OUTCFG
GPIO10INCFG
GPIO9INTD
GPIO9OUTCFG
GPIO9INCFG
GPIO8INTD
GPIO8OUTCFG
GPIO8INCFG
Table 654: CFGB Register Bits
Bit Name Reset RW Description
31 GPIO15INTD 0x0 RW
GPIO15 interrupt direction.
nCELOW = 0x0 - FNCSEL = 0x1 - nCE polarity active low
nCEHIGH = 0x1 - FNCSEL = 0x1 - nCE polarity active high
INTDIS = 0x0 - FNCSEL != 0x1, INCFG = 1 - No interrupt on GPIO transi-
tion
INTBOTH = 0x1 - FNCSEL != 0x1, INCFG = 1 - Interrupt on either low to
high or high to low GPIO transition
INTLH = 0x0 - FNCSEL != 0x1, INCFG = 0 - Interrupt on low to high GPIO
transition
INTHL = 0x1 - FNCSEL != 0x1, INCFG = 0 - Interrupt on high to low GPIO
transition
30:29
GPIO15OUT-
CFG
0x0 RW
GPIO15 output configuration.
DIS = 0x0 - FNCSEL = 0x3 - Output disabled
PUSHPULL = 0x1 - FNCSEL = 0x3 - Output is push-pull
OD = 0x2 - FNCSEL = 0x3 - Output is open drain
TS = 0x3 - FNCSEL = 0x3 - Output is tri-state
M0nCE3 = 0x0 - FNCSEL = 0x1 - IOM0 nCE, Channel 3
M1nCE3 = 0x1 - FNCSEL = 0x1 - IOM1 nCE, Channel 3
M2nCE3 = 0x2 - FNCSEL = 0x1 - IOM2 nCE, Channel 3
MSPInCE0 = 0x3 - FNCSEL = 0x1 - MSPI nCE, Channel 0
28 GPIO15INCFG 0x0 RW
GPIO15 input enable.
READ = 0x0 - Read the GPIO pin data
RDZERO = 0x1 - INTD = 0 - Readback will always be zero
READEN = 0x1 - INTD = 1 - Read the GPIO pin data
27 GPIO14INTD 0x0 RW
GPIO14 interrupt direction.
nCELOW = 0x0 - FNCSEL = 0x1 - nCE polarity active low
nCEHIGH = 0x1 - FNCSEL = 0x1 - nCE polarity active high
INTDIS = 0x0 - FNCSEL != 0x1, INCFG = 1 - No interrupt on GPIO transi-
tion
INTBOTH = 0x1 - FNCSEL != 0x1, INCFG = 1 - Interrupt on either low to
high or high to low GPIO transition
INTLH = 0x0 - FNCSEL != 0x1, INCFG = 0 - Interrupt on low to high GPIO
transition
INTHL = 0x1 - FNCSEL != 0x1, INCFG = 0 - Interrupt on high to low GPIO
transition