User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 471 of 909 2019 Ambiq Micro, Inc.
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11.7.2.19CFGF Register
GPIO Configuration Register F (Pads 40 -47)
OFFSET: 0x00000054
INSTANCE 0 ADDRESS: 0x40010054
GPIO configuration controls for GPIO[47:40]. Writes to this register must be unlocked by the PADKEY
register.
Table 661: CFGF 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
GPIO47INTD
GPIO47OUTCFG
GPIO47INCFG
GPIO46INTD
GPIO46OUTCFG
GPIO46INCFG
GPIO45INTD
GPIO45OUTCFG
GPIO45INCFG
GPIO44INTD
GPIO44OUTCFG
GPIO44INCFG
GPIO43INTD
GPIO43OUTCFG
GPIO43INCFG
GPIO42INTD
GPIO42OUTCFG
GPIO42INCFG
GPIO41INTD
GPIO41OUTCFG
GPIO41INCFG
GPIO40INTD
GPIO40OUTCFG
GPIO40INCFG
Table 662: CFGF Register Bits
Bit Name Reset RW Description
31 GPIO47INTD 0x0 RW
GPIO47 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
GPIO47OUT-
CFG
0x0 RW
GPIO47 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
M0nCE1 = 0x0 - FNCSEL = 0x1 - IOM0 nCE, Channel 1
M1nCE1 = 0x1 - FNCSEL = 0x1 - IOM1 nCE, Channel 1
M2nCE1 = 0x2 - FNCSEL = 0x1 - IOM2 nCE, Channel 1
M3nCE1 = 0x3 - FNCSEL = 0x1 - IOM3 nCE, Channel 1
28 GPIO47INCFG 0x0 RW
GPIO47 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