Analog Devices ADZS-21569-EZKIT, Руководство пользователя

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Table 3-5:
Output Signals of Microchip GPIO Expander (U48 Port B) (Continued)
Bit Signal Name Description FET Processor Signal
(if applicable) Connected Default
7 SPDIF_
DIGITAL_EN
Enables S/PDIF digital connec-
tors U11 and
U12 DAI0_PIN09, DAI0_PIN10 J11 High
Tables Output Signals of Microchip GPIO Expander (U48 Port A) and Signals of Microchip GPIO Expander (U48
Port B) show the output signals of the Microchip GPIO expander ( U48 ), with a TWI address of 0100 010X ,
where X represents the read or write bit. The signals that control an individual FET have an entry in the FET col-
umn. The Component Connected column shows the board IC that is connected if the FET is enabled. However, in
most cases, the Microchip ( U48 ) is controlling the enable signal of a FET switch. Also note that if a particular func-
tionality of the processor signal is being used, it is in bold font in the Processor Signal column.
Table 3-6: Output Signals of Microchip GPIO Expander (U48 Port A)
Bit Signal Name Description FET Processor Signal
(if applicable) Connected Default
0 NOT USED
1 PUSHBUTTON2
_EN
PC_07 is used as GPIO input
for push button 2, enabled by
default U15 PC_07/LP1_CLK/
OSPI_SEL4b/TM0_TMR9/
SYS_FAULT SW3 Low
2 PUSHBUTTON1
_EN
PB_03 is used as GPIO input for
push button 1, enabled by de-
fault U14 PB_03/TM0_TMR3/FLG2/
SPI2_SEL2b/SMC0_ADDR1/
CNT0_UD SW4 Low
3 LEDS_EN
Px & DAI is used as GPIO out-
put for LED7,9,10 enabled by
default U8 DAI0_PINI08, DAI0_PIN11,
PB_03 LED7,9,10 Low
4 NOT USED
5 NOT USED
6 NOT USED
7 NOT USED
Table 3-7: Output Signals of Microchip GPIO Expander (U48 Port B)
Bit Signal Name Description FET Processor Signal
(if applicable) Connected Default
0 ADAU1977_EN
Enables ADAU1977 U8 DAI0_PIN08, DAI0_PIN09,
DAI0_PIN11 and DAI0_PIN19 U44 High
1 ADAU1977_
FAULT_RST_
EN
Enables ADAU1977 FAULT and
RESET U7 PB_13/LP0_D6/SPI1_SEL3b/
UART2_RTSb and ADAU_RE-
SET U44 High
Software-Controlled Switches (SoftConfig)
ADZS-21569-EZKIT Manual 3–9