Analog Devices ADSP-21591, Manual

Page: 23 / 32

Table 3-4: Output Signals of Microchip GPIO Expander (U13 Port A)
Bit Signal Name Description FET Processor Signal
(if applicable) Connected Default
0 LED6
GPIO LED None LED6 Low
1 LED7
GPIO LED None LED7 Low
2 LED4
GPIO LED None LED4 Low
3 SPI2FLASH_
CS_EN
Enable SPI Flash CS U3 PA_05/SPI2_SEL1b/
OSPI_SEL1b/SMC0_D05/
SPI2_SSb U11 High
4 SPI2D2_D3_
EN
Enabel SPI Flash Quad Mode U4 U5 PA_02/SPI2_D2/OSPI_D2/
TWI3_SCL/SMC0_D02/
TM0_ACLK3 PA_03/SPI2_D3/
OSPI_D3/TWI3_SDA/
SMC0_D03 U11 High
5 UART0_EN
Enable FTDI UART to USB U8 PA_06/SPI0_CLK/
UART0_TXb/OSPI_D4/
SMC0_D06/TM0_ACLK1
PA_07/SPI0_MISO/
UART0_RXb/OSPI_D5/
SMC0_D07/TM0_ACI0 U7 Low
6 UART0_FLOW_
EN
Enables UART Flow Control on
FTDI U8 PA_08/SPI0_MOSI/
UART0_RTSb/OSPI_D6/
SMC0_D08/TM0_ACLK2
PA_09/SPI0_SEL1b/
UART0_CTSb/OSPI_D7/
SMC0_D09/SPI0_SSb
U7
Low
7 NOT USED
Table 3-5: Output Signals of Microchip GPIO Expander (U13 Port B)
Bit Signal Name Description FET Processor Signal
(if applicable) Connected Default
0 NOT USED
1 NOT USED
2 NOT USED
3 NOT USED
4 NOT USED
5 NOT USED
6 NOT USED
7 NOT USED
Software-Controlled Switches (SoftConfig)
3–8
EV-21593-SOM
®
Manual