ISD91200 Series Technical Reference Manual
Release Date: Sep 16, 2019
- 41 -
Revision 2.4
[5:4]
PA2MFP
Alternate Function Setting for PA2MFP
00 = GPIO.
01 = SPI0_SCLK0.
10 = DMIC_DAT.
11 = I2S0_SDI
[3:2]
PA1MFP
Alternate Function Setting for PA1MFP
00 = GPIO.
01 = SPI0_MOSI0.
11 = I2S0_BCLK.
[1:0]
PA0MFP
Alternate Function Setting for PA0MFP
00 = GPIO.
01 = SPI0_MISO1.
11 = I2S0_FS.
Register
Offset
R/W
Description
Reset Value
SYS_GPB_MFP
0x3C
R/W
GPIOB multiple alternate functions control register
0x0000_0000
31
30
29
28
27
26
25
24
PB15MFP
PB14MFP
PB13MFP
PB12MFP
23
22
21
20
19
18
17
16
PB11MFP
PB10MFP
PB9MFP
PB8MFP
15
14
13
12
11
10
9
8
PB7MFP
PB6MFP
PB5MFP
PB4MFP
7
6
5
4
3
2
1
0
PB3MFP
PB2MFP
PB1MFP
PB0MFP
Table 5-8 GPIOB Alternate Function Register (SYS_GPB_MFP address 0x5000_003C)
Bits
Description
[31:30]
PB15MFP
Alternate Function Setting for PB15MFP
00 = GPIO.
01 = SPI0_SSB0
10 = SPI1_MISO.
11 = MCLK.
[29:28]
PB14MFP
Alternate Function Setting for PB14MFP
00 = GPIO.
01 = SPI0_SCLK0.
10 = SPI1_SSB.
11 = DMIC_CLK.