RZN1_L1_PIN_DRIVE_STRENGTH
drive = (l1 >> RZN1_L1_PIN_DRIVE_STRENGTH) & 0x3;
l1 &= ~(0x3 << RZN1_L1_PIN_DRIVE_STRENGTH);
l1 |= (drv << RZN1_L1_PIN_DRIVE_STRENGTH);