4.4 Zero Ohm Resistors
SAM V71 Xplained Ultra has several zero ohm resistors that can be used to disconnect I/O pins of the ATSAMV71Q21 from connectors and on-board ICs and to disconnect power signals. All Arduino pin numbers are listed in Arduino Connectors. Table 4-33 lists all zero ohm resistors on the kit. Figure 4-3 and Figure 4-4 shows where they are located.
Info: Note
from Table 4-33 that there are some zero ohm resistors that aren't
mounted by default on the kit.
| Designator | Mounted | From | To | Comment |
|---|---|---|---|---|
| R100 | Yes | VCC_P3V3 | VCC_TARGET_P3V3 | |
| R109 | Yes | V_SUPERCAP | U101_8 | Supercap voltage to U101 |
| R112 | No | U101_8 | Arduino VBAT pin | Power, J501 pin 1 |
| R200 | Yes | PD11 | Audio IRQ | |
| R201 | Yes | PB00 | EXT1 pin 13 | |
| R202 | Yes | PB01 | EXT1 pin 14 | |
| R203 | Yes | PD28 | LCD connector pin 44 | IRQ1 |
| R207 | Yes | PB01 | Arduino pin 14 | Communication, J505 |
| R208 | Yes | PB00 | Arduino pin 15 | Communication, J505 |
| R209 | Yes | PD26 | EXT2 pin 8 | |
| R211 | Yes | PB01 | Arduino pin 23 | Digital Extra, J507 |
| R213 | Yes | PB00 | Arduino pin 24 | Digital Extra, J507 |
| R215 | Yes | PD26 | Arduino pin 54 | Analog low, J502 |
| R216 | No | PE00 | Arduino pin 59 | Analog low, J502 |
| R217 | No | PE03 | Arduino pin 60 | Analog low, J502 |
| R218 | No | PE04 | Arduino pin 61 | Analog low, J502 |
| R219 | Yes | PD24 | Arduino pin 62 | Analog high, J504 |
| R220 | Yes | PA10 | Arduino pin 63 | Analog high, J504 |
| R221 | Yes | PA22 | Arduino pin 64 | Analog high, J504 |
| R222 | No | PE05 | Arduino pin 65 | Analog high, J504 |
| R223 | Yes | PD24 | Audio RF | |
| R224 | Yes | PB01 | Audio TK | |
| R225 | Yes | PA22 | Audio RK | |
| R226 | Yes | PB00 | Audio TF | |
| R228 | Yes | PA10 | Audio RD | |
| R229 | Yes | PD26 | Audio TD | |
| R230 | Yes | PD21 | PLL clock input | |
| R234 | Yes | PD16 | Arduino pin 16 | Communication, J505 |
| R400 | Yes | PB06 (SWDIO) | ARM JTAG | |
| R401 | Yes | PB07 (SWCLK) | ARM JTAG | |
| R402 | Yes | RESET | ARM JTAG | |
| R403 | Yes | PB05 (TRACESWO) | ARM JTAG | |
| R800 | Yes | Audio | Headphone jack | |
| R802 | Yes | Audio | Headphone jack | |
| R806 | Yes | Microphone jack | Audio | |
| R811 | Yes | Microphone jack | Audio | |
| R814 | Yes | GND | Audio GND | |
| R815 | Yes | GND | Audio GND | |
| R816 | Yes | GND | Audio GND | |
| R818 | Yes | GND | PLL AD0 | I2C address select |
| R819 | Yes | VCC_P1V8 | Audio DCVDD | |
| R920 | Yes | VCC_P3V3 | VCC_EDBG_P3V3 |
