EVM User Setup/Configuration
21
SPRUIS4A – December 2019 – Revised May 2020
Copyright © 2019–2020, Texas Instruments Incorporated
Jacinto7 J721E/DRA829/TDA4VM Evaluation Module (EVM)
3.4.2
SOM Configuration DIP Switch
shows the J721E SOM configuration switches (SW1-SW3) to set the various functions SOM.
Table 8. EVM Configuration Switch Function
Switch
Name
Default
Condition
Signal
Operation
SW1.1
ON
LPDDR4_IO_SEL
Selects the I/O voltage level for LPDDR4:
‘0’ (OFF) = Selects 0.6 V I/O for LPDDR4X
‘1’ (ON) = Selects 1.1 V I/O for LPDDR4
SW1.2
OFF
SEL_SOC_I2Cn
MUX to select I2C Interface for PMICs:
‘0’ (OFF) = PMIC I2C to SoC WKUP interface
‘1’ (ON) = PMIC I2C to External Header (test mode only)
SW2.1
OFF
SEL_GPIO8_ALT
Selection for PMIC Watchdog Timer/GPIO8:
‘0’ (OFF) = PMIC watchdog timer control is set with SW2.2
‘1’ (ON) = PMIC I/O used for GPIO8 (test point)
SW2.2
ON
LEOA_WDOG_DIS
Enable/Disable selection for PMIC Watchdog Timer:
‘0’ (OFF) = PMIC watchdog timer is enabled
‘1’ (ON) = PMIC watchdog timer is disabled
(note requires SW2.1 to be set to OFF)
SW3.1
ON
SOC_SAFETY_ERRz
Option to combine SOC_SAFETY_ERRz with MCU_SAFETY_ERR and PMIC.
‘0’ (OFF) = SOC_SAFETY_ERRz (Main) is isolated from PMIC.
‘1’ (ON) = SOC_SAFETY_ERRz (Main) is connected to PMIC.
SW3.2
OFF
SOC_PWR_EN
Manual method of enabling PMIC
‘0’ (OFF) = PMIC enabled by EVM system
‘1’ (ON) = PMIC enabled manually (test mode only)